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 V
CC
= 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
TSSOP16
SO-16
Table 1.
Device summary
Order codes Temperature range
ST26C32ABN
ST26C32ABDR
ST26C32ABTR
-40 to 85 °C
-40 to 85 °C
-40 to 85 °C
Package
DIP-16
SO-16 (tape and reel)
TSSOP16 (tape and reel)
Packaging
25 parts per tube / 40 tube per box
2500 parts per reel
2500 parts per reel
June 2008 Rev 4 1/14
www.st.com
14
3
4
1
2
5
Contents
Contents
ST26C32AB
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2/14
ST26C32AB
Figure 1.
Pin connections
Pin configuration
12
13
14
15
16
10
11
8
9
6
7
4
5
1
2
3
Table 2.
Pin n°
Pin description
Symbol
C
IN1
C
IN2
C
OUT
EN
D
OUT
D
IN2
D
IN1
V
CC
A
IN1
A
IN2
A
OUT
EN
B
OUT
B
IN2
B
IN1
GND
Input A1
Input A2
Channel A Output
ENABLE
Channel B Output
Input B2
Input B1
Ground
Input C1
Input C2
Channel C output
ENABLE
Channel D output
Input D2
Input D1
Supply voltage
Name and function
3/14
Pin configuration
Table 3.
Truth table
Enable
L
Enable
H
All other combinations of enable inputs
Note: L = Low voltage state
H = High logic state
X = Don’t care
Z = High impedance
Input
X
V
ID
≥ V
TH(MAX)
V
ID
≤ V
TH(MIN)
Open
ST26C32AB
Output
L
H
Z
H
4/14
ST26C32AB Maximum ratings
Table 4.
Symbol
Absolute maximum ratings
(1) (2)
Parameter Value Unit
V
CC
V
CM
V
DIFF
V
IN
I
OMAX
T
STG
Supply voltage
Input common mode range
Differential input voltage
Enable input voltage
Maximum current per output
Storage temperature range
7
± 14
± 14
7
± 25
-65 to +150
V
V
V
V mA
°C
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.
Table 5.
Symbol
Recommended operating conditions
Parameter Value Unit
V
CC
T
A t r
, t f
Supply voltage
Operating temperature range
Maximum enable input rise or fall times
4.5 to 5.5
-40 to +85
500
V
°C ns
5/14
Electrical characteristics
3 Electrical characteristics
ST26C32AB
Table 6.
Electrical characteristics
(V
CC
= 5 V
± 10 %, unless otherwise specified
(1)
)
Value
Symbol Parameter Test conditions Unit
Min.
Typ.
Max.
V
TH
R
IN
I
IN
V
OH
V
OL
V
IH
V
IL
I
OZ
I
I
I
CC
Minimum differential input voltage
Input resistance
V
OUT
= V
OH or V
OL
, -7V < V
CM
< 7V
Input current
High level output voltage
Low level output voltage
Minimum enable high input level voltage
V
IN
= -7V, 7V, other input = GND
V
IN
= 10V, other input = GND
V
IN
= -10V, other input = GND
V
DIFF
= 1V, I
OUT
= -6mA
V
DIFF
= -1V, I
OUT
= 6mA
Minimum enable low input level voltage
3-state output leakage current
V
OUT
= V
CC
or GND
ENABLE = V
IL
, ENABLE = V
IH
Maximum enable input current
V
IN
= V
CC
or GND
Quiescent power supply current
V
CC
= Max, V
(DIFF)
= 1V
-200
5
3.8
2
35
6.8
1.1
-2
4.2
0.2
±0.5
16
200
10
1.5
-2.5
0.3
0.8
±5
±1
23 mV k
Ω mA
V
V
V
V
µA
µA mA
V
HYST
Input hysteresis V
CM
= 0V 60 mV
1.
Unless otherwise specified, min./max. limits apply across the recommended operating temperature range. All typical are given for V
CC
= 5 V and T
A
= 25 °C
Table 7.
Switching characteristics (V
CC
= 5 V
± 10 %,
(1)
)
Value
Symbol Parameter Test conditions Unit
Min.
Typ.
Max.
t
PLH t
PHL t
RISE t
FALL t t t t
PZH
PZL
PHZ
PLZ
D
R
Propagation delay input to output
Output rise and fall times
C
L
C
L
= 50pF, V
DIFF
= 50pF, V
DIFF
= 2.5V, V
CM
= 2.5V, V
CM
= 0V
= 0V
Propagation enable time to output
Propagation disable time to output
C
L
= 50pF, V
DIFF
= 2.5V, R
L
= 1000
Ω
C
L
= 50pF, V
DIFF
= 2.5V, R
L
= 1000
Ω
Data rate
C
L
= 50pF, V
DIFF
= 2.5V
All outputs loaded and switching
10
19
4
13
13
20
30
9
23
22 ns ns
Mbits/s
1.
Unless otherwise specified, min./max. limits apply across the recommended operating temperature range. All typical are given for V
CC
= 5 V and T
A
= 25 °C ns ns
6/14
ST26C32AB
4 Package mechanical data
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
7/14
Package mechanical data
Plastic DIP-16 (0.25) mechanical data
mm.
Typ.
Max.
inch.
Typ.
Dim.
I
L
Z e e3
F a1
B
D
E b b1
Min.
0.51
0.77
0.5
0.25
8.5
2.54
17.78
3.3
1.65
20
7.1
5.1
1.27
Min.
0.020
0.030
0.020
0.010
0.335
0.100
0.700
0.130
ST26C32AB
Max.
0.065
0.787
0.280
0.201
0.050
8/14
P001C
Dim.
E e e3
C c1
D
A a1 a2 b b1
M
S
F
G
L
ST26C32AB
Min.
0.1
0.35
0.19
9.8
5.8
3.8
4.6
0.5
SO-16 mechanical data
mm.
Typ.
Max.
1.75
0.25
1.64
0.46
0.25
Min.
0.004
0.013
0.007
0.5
10
6.2
45° (typ.)
0.385
0.228
1.27
8.89
4.0
5.3
1.27
0.62
8° (max.)
0.149
0.181
0.019
Package mechanical data inch.
Typ.
0.019
0.050
0.350
Max.
0.068
0.010
0.063
0.018
0.010
0.393
0.244
0.157
0.208
0.050
0.024
0016020D
9/14
Dim.
E
E1 c
D
A
A1
A2 b e
K
L
Package mechanical data
Min.
0.05
0.8
0.19
0.09
4.9
6.2
4.3
0°
0.45
TSSOP16 mechanical data
mm.
Typ.
Min.
1
5
6.4
4.4
0.65 BSC
Max.
1.2
0.15
1.05
0.30
0.20
5.1
6.6
4.48
0.002
0.031
0.007
0.004
0.193
0.244
0.169
0.60
8°
0.75
0°
0.018
ST26C32AB inch.
Typ.
0.004
0.039
0.197
0.252
0.173
0.0256 BSC
Max.
0.047
0.006
0.041
0.012
0.0079
0.201
0.260
0.176
0.024
8°
0.030
A
A2
A1 b e
D c
K
L
E
E1
PIN 1 IDENTIFICATION
1
10/14
0080338D
Dim.
Ao
Bo
Ko
Po
P
D
N
T
A
C
ST26C32AB Package mechanical data
6.45
10.3
2.1
3.9
7.9
Min.
12.8
20.2
60
Tape & reel SO-16 mechanical data
mm.
Typ.
Min.
Max.
330
13.2
0.504
0.795
2.362
22.4
6.65
10.5
2.3
4.1
8.1
0.254
0.406
0.082
0.153
0.311
inch.
Typ.
Max.
12.992
0.519
0.882
0.262
0.414
0.090
0.161
0.319
11/14
Package mechanical data
Tape & reel TSSOP16 mechanical data
Min.
mm.
Typ.
Min.
Dim.
Ao
Bo
Ko
Po
P
D
N
T
A
C 12.8
20.2
60
6.7
5.3
1.6
3.9
7.9
Max.
330
13.2
22.4
6.9
5.5
1.8
4.1
8.1
0.504
0.795
2.362
0.264
0.209
0.063
0.153
0.311
inch.
Typ.
ST26C32AB
Max.
12.992
0.519
0.882
0.272
0.217
0.071
0.161
0.319
12/14
ST26C32AB
5 Revision
Table 8.
Date
Document revision history
Revision
02-May-2006
12-Jun-2008
3
4
Order codes updated.
Added:
Table 1 on page 1
.
Changes
Revision history
13/14
ST26C32AB
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