June 2008 Rev 4 1/14
14
ST26C32AB
CMOS quad 3-state differential line receiver
Features
CMOS design for low power
± 0.2 V sensitivity over input common mode
voltage range
Typical propagation delay: 19 ns
Typical input hysteresis: 60 mV
Input will not load line when VCC = 0 V
Meets the requirements of EIA standard
RS-422, RS-423
3-state outputs for connection to system buses
Available in surface mount
Description
The ST26C32AB is a quad differential line
receiver designed to meet the RS-422, RS-423
standards for balanced and unbalanced digital
data transmission, while retaining the low power
characteristics of CMOS.
The ST26C32AB has an input sensitivity of 200
mV over the common mode input voltage range of
± 7 V. The ST26C32AB features internal pull-up
and pull-down resistors which prevent output
oscillation on unused channels. The ST26C32AB
provides an enable and disable function to all four
receivers and features 3-state output with 6 mA
source and sink capability.
DIP-16 SO-16
TSSOP16
Table 1. Device summary
Order codes Temperature range Package Packaging
ST26C32ABN -40 to 85 °C DIP-16 25 parts per tube / 40 tube per box
ST26C32ABDR -40 to 85 °C SO-16 (tape and reel) 2500 parts per reel
ST26C32ABTR -40 to 85 °C TSSOP16 (tape and reel) 2500 parts per reel
www.st.com
Contents ST26C32AB
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Contents
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
P512350
ST26C32AB Pin configuration
3/14
1 Pin configuration
Figure 1. Pin connections
Table 2. Pin description
Pin n° Symbol Name and function
1A
IN1 Input A1
2A
IN2 Input A2
3A
OUT Channel A Output
4 EN ENABLE
5B
OUT Channel B Output
6B
IN2 Input B2
7B
IN1 Input B1
8 GND Ground
9C
IN1 Input C1
10 CIN2 Input C2
11 COUT Channel C output
12 EN ENABLE
13 DOUT Channel D output
14 DIN2 Input D2
15 DIN1 Input D1
16 VCC Supply voltage
Pin configuration ST26C32AB
4/14
Note: L = Low voltage state
H = High logic state
X = Don’t care
Z = High impedance
Table 3. Truth table
Enable Enable Input Output
LHXZ
All other combinations of enable inputs
VID VTH(MAX) H
VID VTH(MIN) L
Open H
ST26C32AB Maximum ratings
5/14
2 Maximum ratings
Table 4. Absolute maximum ratings (1) (2)
1. Absolute maximum ratings are those values beyond which the safety of the device cannot be guaranteed. They are not
meant to imply that the device should be operated at these limits. The table of electrical characteristics provide conditions
for actual device operation.
2. Unless otherwise specified, all voltage are referenced to ground. All currents into the device pins are positive; all currents
out of the device pins are negative.
Symbol Parameter Value Unit
VCC Supply voltage 7 V
VCM Input common mode range ± 14 V
VDIFF Differential input voltage ± 14 V
VIN Enable input voltage 7 V
IOMAX Maximum current per output ± 25 mA
TSTG Storage temperature range -65 to +150 °C
Table 5. Recommended operating conditions
Symbol Parameter Value Unit
VCC Supply voltage 4.5 to 5.5 V
TAOperating temperature range -40 to +85 °C
tr, tfMaximum enable input rise or fall times 500 ns
CC CC
Electrical characteristics ST26C32AB
6/14
3 Electrical characteristics
Table 6. Electrical characteristics
(VCC = 5 V ± 10 %, unless otherwise specified (1))
1. Unless otherwise specified, min./max. limits apply across the recommended operating temperature range. All typical are
given for VCC = 5 V and TA = 25 °C
Symbol Parameter Test conditions
Value
Unit
Min. Typ. Max.
VTH
Minimum differential input
voltage VOUT = VOH or VOL, -7V < VCM < 7V -200 35 200 mV
RIN Input resistance VIN = -7V, 7V, other input = GND 5 6.8 10 kΩ
IIN Input current VIN = 10V, other input = GND 1.1 1.5 mA
VIN = -10V, other input = GND -2 -2.5
VOH High level output voltage VDIFF = 1V, IOUT = -6mA 3.8 4.2 V
VOL Low level output voltage VDIFF = -1V, IOUT = 6mA 0.2 0.3 V
VIH
Minimum enable high input
level voltage 2V
VIL
Minimum enable low input
level voltage 0.8 V
IOZ 3-state output leakage current VOUT = VCC or GND
ENABLE = VIL, ENABLE = VIH
±0.5 ±5 µA
II
Maximum enable input
current VIN = VCC or GND ±1 µA
ICC
Quiescent power supply
current VCC = Max, V(DIFF) = 1V 16 23 mA
VHYST Input hysteresis VCM = 0V 60 mV
Table 7. Switching characteristics (VCC = 5 V ± 10 %, (1))
Symbol Parameter Test conditions
Value
Unit
Min. Typ. Max.
tPLH
tPHL
Propagation delay input to
output CL = 50pF, VDIFF = 2.5V, VCM = 0V 19 30 ns
tRISE
tFALL
Output rise and fall times CL = 50pF, VDIFF = 2.5V, VCM = 0V 4 9 ns
tPZH
tPZL
Propagation enable time
to output CL = 50pF, VDIFF = 2.5V, RL = 1000Ω13 23 ns
tPHZ
tPLZ
Propagation disable time
to output CL = 50pF, VDIFF = 2.5V, RL = 1000Ω13 22 ns
DRData rate CL = 50pF, VDIFF = 2.5V
All outputs loaded and switching 10 20 Mbits/s
1. Unless otherwise specified, min./max. limits apply across the recommended operating temperature range. All typical are
given for VCC = 5 V and TA = 25 °C
ST26C32AB Package mechanical data
7/14
4 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
93 WWI—\Wmmmfl 16 9 D .. 1 B L_|\_ll_l|_ll_ll_l|_lLJ 8/14
Package mechanical data ST26C32AB
8/14
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
a1 0.51 0.020
B 0.77 1.65 0.030 0.065
b0.5 0.020
b1 0.25 0.010
D200.787
E8.5 0.335
e 2.54 0.100
e317.780.700
F 7.1 0.280
I 5.1 0.201
L3.30.130
Z 1.27 0.050
Plastic DIP-16 (0.25) mechanical data
P001C
ST26C32AB Package mechanical data
9/14
Dim. mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 1.75 0.068
a1 0.1 0.25 0.004 0.010
a2 1.64 0.063
b0.35 0.46 0.0130.018
b1 0.190.25 0.007 0.010
C 0.5 0.019
c1 45° (typ.)
D9.810 0.385 0.393
E5.86.2 0.2280.244
e 1.27 0.050
e38.89 0.350
F3.84.0 0.1490.157
G 4.6 5.30.181 0.208
L 0.5 1.27 0.0190.050
M 0.62 0.024
S8° (max.)
SO-16 mechanical data
0016020D
Emmflg 4L .LL WHHHHHHF JUUUUUUL 10/14
Package mechanical data ST26C32AB
10/14
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 1.2 0.047
A1 0.05 0.15 0.002 0.004 0.006
A2 0.81 1.05 0.031 0.039 0.041
b0.190.30 0.007 0.012
c0.090.20 0.004 0.0079
D4.95 5.1 0.193 0.197 0.201
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.34.4 4.480.1690.1730.176
e 0.65 BSC 0.0256 BSC
K0° 8°0° 8°
L 0.45 0.60 0.75 0.0180.024 0.030
TSSOP16 mechanical data
cE
b
A2
A
E1
D
1
PIN 1 IDENTIFICATION
A1 L
K
e
0080338D
KOL new \fl W I; \ \ Note Drawmg not m scale
ST26C32AB Package mechanical data
11/14
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A330 12.992
C 12.813.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 22.4 0.882
Ao 6.45 6.65 0.254 0.262
Bo 10.310.5 0.406 0.414
Ko 2.1 2.30.082 0.090
Po 3.94.1 0.1530.161
P7.98.1 0.311 0.319
Tape & reel SO-16 mechanical data
7 K/ / 7 “\\ ,/ g R A ‘ \ \__ \_\ \ /// Po KoeohWWE Note Drawmg not m scale 12/14
Package mechanical data ST26C32AB
12/14
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A330 12.992
C 12.813.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 22.4 0.882
Ao 6.7 6.90.264 0.272
Bo 5.35.5 0.2090.217
Ko 1.6 1.80.0630.071
Po 3.94.1 0.1530.161
P7.98.1 0.311 0.319
Tape & reel TSSOP16 mechanical data
ST26C32AB Revision history
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5 Revision history
Table 8. Document revision history
Date Revision Changes
02-May-2006 3 Order codes updated.
12-Jun-2008 4 Added: Table 1 on page 1.
ST26C32AB
14/14
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