SN74AS280DR Datasheet by Texas Instruments

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Q Small-Outline (D) Packages and Standard Plastic (N) GOO-mil DlPs ii 10 i—u—u—u—u—u—u—t \Ammb |_l|_l|_l|_l|_l|_l|_l description These universal 97bit parity generators/checkers utilize advanced Schottky highrperiormance circuitry and feature odd (2 ODD) and even (2 EVEN) outputs to facilitate operation ole applications. The wordrlength capability is easily expanded by cascading. These devices can be used to upgrade the perlormance of most systems utilizing SN74ASi 80 parity generators/checkers. Although the SN74AL8280 and SN74A8280 a expander inputs, the corresponding lunction is provided by the availability of an input absence of any internal connection at terminal 3. This permits the SN74AL8280 a substituted for the SN74ALS180 and SN74ASiBO in existing designs to produce an id the devices are mixed with existing SN74AL8180 and SN74A8180 devices. All SN74A8280 inputs are butlered to lower the drive requirements. The SN74AL8280 and SN74A8280 are characterized lor operation from 050 to 70°C FUNCTION TABLE NO. OF INPUTS OUTPUTS A—l THAT ARE HIGH 2 EVEN : con 0, 2 4. 6, a H L i, 3 5. 7, 9 L H logic symbol? A B m c : EVEN II n :2 E :3 F : ODD I c 2 H 4 I TThis symbol is in accordance with ANSi/iEEE Std 9171984 and iEC Publication 617712 Copyright © 1994 ‘b TEXAS INSTRUMENTS POST oFFicE BOX 655303 - DALLAS. TEXAS 752s5 POST oFFicE BOX i443 - HousroN TEXAS 7725mm
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SDAS038C − DECEMBER 1982 − REVISED DECEMBER 1994
Copyright 1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
Generate Either Odd or Even Parity for Nine
Data Lines
Cascadable for n-Bit Parity
Can Be Used to Upgrade Existing Systems
Using MSI Parity Circuits
Package Options Include Plastic
Small-Outline (D) Packages and Standard
Plastic (N) 300-mil DIPs
description
These universal 9-bit parity generators/checkers
utilize advanced Schottky high-performance
circuitry and feature odd (Σ ODD) and even (Σ EVEN) outputs to facilitate operation of either odd- or even-parity
applications. The word-length capability is easily expanded by cascading.
These devices can be used to upgrade the performance of most systems utilizing the SN74ALS180 and
SN74AS180 parity generators/checkers. Although the SN74ALS280 and SN74AS280 are implemented without
expander inputs, the corresponding function is provided by the availability of an input (I) at terminal 4 and the
absence of any internal connection at terminal 3. This permits the SN74ALS280 and SN74AS280 to be
substituted for the SN74ALS180 and SN74AS180 in existing designs to produce an identical function even if
the devices are mixed with existing SN74ALS180 and SN74AS180 devices.
All SN74AS280 inputs are buffered to lower the drive requirements.
The SN74ALS280 and SN74AS280 are characterized for operation from 0°C to 70°C.
FUNCTION TABLE
NO. OF INPUTS
A−I
OUTPUTS
A−I
THAT ARE HIGH Σ EVEN Σ ODD
0, 2, 4, 6, 8 H L
1, 3, 5, 7, 9 L H
logic symbol
2k
12
E
8
A9
B10
C11
D
13
F1
G2
H4
I
6
5Σ EVEN
Σ ODD
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
G
H
NC
I
Σ EVEN
Σ ODD
GND
VCC
F
E
D
C
B
A
NC − No internal connection
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*9 TEXAS INSTRUMENTS
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SDAS038C − DECEMBER 1982 − REVISED DECEMBER 1994
2POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
logic diagram (positive logic)
A
B
C
D
E
F
G
H
I
8
9
10
11
12
13
1
2
4
5
6
Σ EVEN
Σ ODD
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN74ALS280 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range 65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
VIK PARAMETER (INPUT) (OUTPUT) ‘PLH ‘PHL ‘PLH ‘PHL {5‘ TEXAS INSTRUMENTS
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SDAS038C − DECEMBER 1982 − REVISED DECEMBER 1994
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
recommended operating conditions
SN74ALS280
UNIT
MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 V
VIH High-level input voltage 2 V
VIL Low-level input voltage 0.8 V
IOH High-level output current 2.6 mA
IOL Low-level output current 24 mA
TAOperating free-air temperature 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74ALS280
UNIT
PARAMETER
TEST CONDITIONS
MIN TYPMAX
UNIT
VIK VCC = 4.5 V, II = −18 mA 1.5 V
VOH
VCC = 4.5 V to 5.5 V, IOH = −0.4 mA VCC −2
V
VOH VCC = 4.5 V, IOH = −2.6 mA 2.4 3.3 V
VOL
VCC = 4.5 V
IOL = 12 mA 0.25 0.4
V
VOL VCC = 4.5 V IOL = 24 mA 0.35 0.5 V
IIVCC = 5.5 V, VI = 7 V 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 µA
IIL VCC = 5.5 V, VI = 0.4 V 0.1 mA
IOVCC = 5.5 V, VO = 2.25 V −30 −112 mA
ICC VCC = 5.5 V 10 16 mA
All typical values are at VCC = 5 V, TA = 25°C.
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
switching characteristics (see Figure 1)
PARAMETER FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 ,
TA = MIN to MAX§UNIT
PARAMETER
(INPUT)
(OUTPUT)
SN74ALS280
UNIT
MIN MAX
tPLH
Any
Σ EVEN
3 20
ns
tPHL Any Σ EVEN 3 20 ns
tPLH
Any
Σ ODD
3 20
ns
tPHL
Any
Σ
ODD
4 22
ns
§For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
PARAMETER (INPUT) (OUTPUT) ‘PLH ‘PHL ‘PLH ‘PHL *9 TEXAS INSTRUMENTS
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
SDAS038C − DECEMBER 1982 − REVISED DECEMBER 1994
4POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN74AS280 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range 65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN74AS280
UNIT
MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 V
VIH High-level input voltage 2 V
VIL Low-level input voltage 0.8 V
IOH High-level output current −2 mA
IOL Low-level output current 20 mA
TAOperating free-air temperature 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN74AS280
UNIT
PARAMETER
TEST CONDITIONS
MIN TYPMAX
UNIT
VIK VCC = 4.5 V, II = −18 mA 1.5 V
VOH VCC = 4.5 V to 5.5 V, IOH = −2 mA VCC −2 V
VOL VCC = 4.5 V, IOL = 20 mA 0.35 0.5 V
IIVCC = 5.5 V, VI = 7 V 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 µA
IIL VCC = 5.5 V, VI = 0.4 V 0.5 mA
IO§VCC = 5.5 V, VO = 2.25 V −30 −112 mA
ICC VCC = 5.5 V 25 35 mA
All typical values are at VCC = 5 V, TA = 25°C.
§The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
switching characteristics (see Figure 1)
PARAMETER FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500 ,
TA = MIN to MAXUNIT
PARAMETER
(INPUT)
(OUTPUT)
SN74AS280
UNIT
MIN MAX
tPLH
Any
Σ EVEN
3 12
ns
tPHL Any Σ EVEN 311 ns
tPLH
Any
Σ ODD
3 12
ns
tPHL
Any
Σ
ODD
3 11.5
ns
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‘9 TEXAS INSTRUMENTS
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SDAS038C − DECEMBER 1982 − REVISED DECEMBER 1994
5
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
APPLICATION INFORMATION
A
B
C
D
E
F
G
H
I
Σ EVEN
Σ ODD
A
B
C
D
E
F
G
H
I
Σ EVEN
Σ ODD
A
B
C
D
E
F
G
H
I
Σ EVEN
Σ ODD
H - Even
L = Odd
H - Odd
L = Even
A
B
C
D
E
F
G
H
I
Σ ODD
A
B
C
D
E
F
G
H
I
Σ ODD
A
B
C
D
E
F
G
H
I
Σ ODD
H - Even
L = Odd
H - Odd
L = Even
To Other
SN74AS280s
A
B
C
D
E
F
G
H
I
Σ EVEN
Σ ODD
25-LINE
PARITY GENERATOR/CHECKER 81-LINE
PARITY GENERATOR/CHECKER
Three SN74ALS280/SN74AS280 devices can be
used to implement a 25-line parity generator/
checker.
As an alternative, the Σ ODD outputs of two or three
parity generators/checkers can be decoded with a
2-input (AS86A or ALS86) exclusive-OR gate for
18- or 27-line parity applications.
Longer word lengths can be implemented by cascading SN74ALS280/SN74AS280
devices. Parity can be generated for word lengths up to 81 bits.
From OquuI Under 1251 CL I (see Note A) LOAD CIRCUIT I=O ' ' Bl-STATE LOAD CIRCUIT TOTEM-POLE OUTP FOR 3-STATE OUTP Timing 3-5 V 7 7 7 Inpm 1.3 v I 777777 0.3 v L J 4—» II. lsu H I I I Data I 7 7 7 3-5 V mp”. 1.3 v 1.3 v 0.3 v 7 7 7 VOLTAGE WAVEFORMS SETUP AND HOLD TIMES Output Comm (low-level enabling) Waveform 1 51 Closed (see None 3) I H g ‘PHL H I I Waveform 2 I 51 Open U (see None 3) 7 , VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS ‘9 TEXAS INSTRUMENTS 8 POST OFFICE on 655303 I DALLAS IEXAS 75285 POST OFFICE aox 1m - HOUSTON TEXAS 772517w43
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SDAS038C − DECEMBER 1982 − REVISED DECEMBER 1994
6POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
tPHZ
tPLZ
tPHL tPLH
0.3 V
tPZL
tPZH
tPLH tPHL
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
From Output
Under Test Test
Point
R1
S1
CL
(see Note A)
7 V
1.3 V
1.3 V1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
1.3 V 1.3 V 3.5 V
3.5 V
0.3 V
0.3 V
High-Level
Pulse
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATIONS
Input
Out-of-Phase
Output
(see Note C)
1.3 V 1.3 V
1.3 V1.3 V
1.3 V 1.3 V
1.3 V1.3 V
1.3 V
1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
VOL
VOH
VOH
VOL
Output
Control
(low-level
enabling)
Waveform 1
S1 Closed
(see Note B)
Waveform 2
S1 Open
(see Note B) [0 V
VOH
VOL
[3.5 V
In-Phase
Output
0.3 V
1.3 V 1.3 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
R2
VCC
RL
Test
Point
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
From Output
Under Test Test
Point
CL
(see Note A) RL
RL = R1 = R2
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
I TEXAS INSTRUMENTS Sample: Sample:
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PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead finish/
Ball material
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
SN74AS280N ACTIVE PDIP N 14 25 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74AS280N
SN74AS280NSR ACTIVE SO NS 14 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 74AS280
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
I TEXAS INSTRUMENTS
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I TEXAS INSTRUMENTS REEL DIMENSIONS TAPE DIMENSIONS 7 “KO '«PT» Reel Diame|er AD Dimension des‘gned to accommodate the componem wwdlh E0 Dimension damned to eccemmodam the component \ength KO Dimenslun desgned to accommodate the componem thickness 7 w Overen with loe earner cape i p1 Pitch between successwe cavuy eemers f T Reel Width (W1) QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE O O O D O O D O Sprockemoles ,,,,,,,,,,, ‘ User Direcllon 0' Feed Pocket Quadrams
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SN74AS280NSR SO NS 14 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1
PACKAGE MATERIALS INFORMATION
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Pack Materials-Page 1
I TEXAS INSTRUMENTS TAPE AND REEL BOX DIMENSIONS
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SN74AS280NSR SO NS 14 2000 853.0 449.0 35.0
PACKAGE MATERIALS INFORMATION
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Pack Materials-Page 2
MECHANICAL DATA NS (R-PDSO-G") PLASTIC SMALL—OUTLINE PACKAGE 14-PINS SHOWN HHFHHFH j j t t H H j, A jfi/—\ % lgLLLLLiLLL/fiif A MAX 1060 1060 1290 1530 A MW 990 9,90 1230 14‘70 4040062/0 03/03 VOTES: A. AH Hneur dimenswons are m mHHmetevs a, Tm: druwmg 5 subject to change wmom name. 0 Body dwmenswons do not mamas mom flash 0v pmtmswom not to exceed 0,15 INSTRUMEN'IS www.li.m
MECHANICAL DATA N (R—PDlP-T“) PLASTIC DUAL—IN—LINE PACKAGE 16 P15 SHOWN PWS " A L . [NM 15 a 20 16 9 0 775 U 777 0 SZU '1 USE 3 , 1H HH HH r% r’H r"—1 r’H H1 1 A VAX “9‘69? (191591 (23,37) (25,92) 0 250 (6,50‘ A MN [1145‘ 0142‘ 0.350 new 3 O 240 (6.10), 15 92/ (1832/ (2 .59) (23,58) MSiUO‘ (A AA AA Ari AA AA AA R1 &. VAR1AT1CN M RR AC AD 1 B 0070( (17s) 0015 (111) A 0045 (1,111 g n > , ‘ -) 3.020 (0,51) MW w o 5 (0 35) 0200( 38) MAX f, ), Gnu E Home 1 1‘ 9 fix—1%)” 1 0125’ 1/111 4% 0010 (v.37 ) NOM 31a) U L»- J 0450 (13,92) MAX L 202‘ (0,53) » e c 015 (0,35) / \ a; 00‘s (0,Zb)® / \ 1 1 \\¥,// 11/18 Pm (My > @ 20 Pm vendor upho'v mom/r 17/7037 NO'FS A AH Mnec' mmensmr‘fi: B 1m: drawmq 1s sume m muss (m1111mevem) 0 change mm): nofice /c\ FuHs wumn JEDEC M57001, except 15 an: 20 p171 'r1111mLm body 1mm (01m A) A The 70 p171 and 15m} shmflder Md” 15 a ve'vdnr 0311071, eher NIH Dr 111 wkflh INSI'RUMENTS www.1i.com
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