MC26C32
MOTOROLA
1
Product Preview
Quad EIA-422-A Line Receiver
CMOS
The MC26C32 is a quad differential line receiver designed for digital data
transmission over balanced lines. The MC26C32 meets all the requirements of
standard EIA–422–A while retaining the low–power characteristics of CMOS.
The MC26C32 has an input sensitivity of 200 mV over the common mode
input voltage range of
±
7 V. In addition, each receiver chain has internal
hysteresis circuitry to improve noise margin and discourage output instability for
slowly changing input waveforms.
The MC26C32 is pin compatible with the AM26LS32.
All pins are protected against damage due to electrostatic discharges.
•
Typical Power Supply Current: 6 mA
•
2000 V ESD Protection on the Inputs and Outputs
•
Typical Propagation Delay: 18 ns
•
Typical Input Hysteresis: 75 mV
•
Meets the Requirements of Standard EIA–422–A
•
Operation from Single 5 V Supply
•
High Impedance Mode for Outputs Connected to System Buses
•
TTL/CMOS Compatible Outputs
BLOCK DIAGRAM
ENB
ENB
INPUT
D2
INPUT
C2
INPUT
B2
INPUT
A2
OUTPUT
D
OUTPUT
C
OUTPUT
B
OUTPUT
A
VCC
GND
12
4
10
6
14
2
8
16
11
13
5
3
+ –
+ –
+ –
+ –
INPUT
D1
9
7
15
1
INPUT
C1
INPUT
B1
INPUT
A1
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
Order this document
by MC26C32/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC26C32
P SUFFIX
PLASTIC DIP
CASE 648
D SUFFIX
SOG PACKAGE
CASE 751B
ORDERING INFORMATION
MC26C32P
Plastic DIP
MC26C32D
SOG Package
16
1
16
1
©
Motorola, Inc. 1995
REV 4
10/95
MC26C32
MOTOROLA
2
TRUTH TABLE
Control Inputs E/E
Input
Output
L/H
X
Z
All other combinations of
enable inputs
VID
≥
VTH (max)
1
enable inputs
VID
≥
VTH (min)
0
Open
1
X = Don’t Care
H = High Logic State
Z = High Impedance
L = Low Logic State
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Voltage
VCC
7
V
Input Voltage
VI
±
10
V
Input Differential Voltage
VID
±
14
V
Enable Control Input Voltage
Vin
VCC + 0.5
V
Storage Temperature
Tstg
– 65 to + 150
°
C
Maximum Current per Output
IO
±
25
mA
ESD (Human Body Model)
2000
V
OPERATING CONDITIONS
Rating
Symbol
Min
Max
Unit
Power Supply Voltage
VCC
4.5
5.5
V
Operating Temperature Range
TA
– 40
+ 85
°
C
Input Rise and Fall Time
tr, tf
—
500
ns
DC CHARACTERISTICS
(VCC = 4.5 to 5.5 V, TA = – 40 to +
85
°
C, unless otherwise stated) (See Note 1)
Parameter
Symbol
Min
Typ
Max
Unit
Power Supply Current, VCC
≥
Max
ICC
—
6
12
mA
Enable Input Current, Vin = VCC or GND
LI
—
—
±
1.0
µ
A
Input Voltage — Low Logic State (Enable Control)
VIL
—
—
0.8
V
Input Voltage — High Logic State (Enable Control)
VIH
2
—
—
V
Differential Input Voltage, – 7 V < VLCM < 7 V
Vout = VOH
Vout = VOL
VTH
0.2
—
—
—
—
– 0.2
V
Input Hysteresis, VLCM = 0 V
Vhys
—
75
—
mV
Comparator Input Current
Vin = + 10 V, Other Input = GND
Vin = – 10 V, Other Input = GND
Iin
—
—
1.4
– 2.5
—
—
mA
Comparator Input Resistance, – 10 V < VLCM < + 10 V
Rin
4
4.8
—
k
Ω
Output Voltage (Low Logic State) VID = – 1 V, Iout = 6 mA (Note 2)
VOL
—
0.13
0.33
V
Output Voltage (High Logic State) VID = + 1 V, Iout = – 6 mA (Note 2)
VOH
3.8
4.8
—
V
Output Leakage Current (High Logic State) Vout = VCC or GND
IOZ
– 5
—
5
µ
A
NOTES:
1. All currents into device pins are shown as positive, out of device pins are negative. All voltages referenced to ground unless otherwise noted.
2. See EIA specifications EIA–422–A for exact test conditions.
This device contains circuitry to protect the
inputs against damage due to high static volt-
ages or electric fields; however, it is advised that
normal precautions be taken to avoid applica-
tions of any voltage higher than the maximum
rated voltages to this high impedance circuit.
For proper operation it is recommended that
Vin and Vout be constrained to the range VSS
≤
(Vin or Vout)
≤
VDD. Reliability of operation is
enhanced if unused inputs are tied to and
appropriate logic voltage level (e.g., either VSS
or VDD).
MC26C32
MOTOROLA
3
AC CHARACTERISTICS
(VCC = 4.5 to 5.5 V, TA = – 40 to + 85
°
C, unless otherwise stated)
Parameter
Symbol
Min
Typ
Max
Unit
Propagation Delay Input to Output, CL = 50 pF, VDIFF = 2.5 V
tPLH
tPHL
—
18
30
ns
Skew =
tPHL – tPLH
Skew
—
1
—
ns
Propagation Delay Enable to Output
CL = 50 pF, RL = 1000
Ω
, VDIFF = 2.5 V
tPLZ
tPHZ
—
12
—
ns
Propagation Delay Enable to Output
CL = 50 pF, RL = 1000
Ω
, VDIFF = 2.5 V
tPZL
tPZH
—
14
—
ns
* Skew: difference in propagation delays between complementary outputs.
AC TEST CIRCUIT AND SWITCHING TIME WAVEFORMS
Figure 1. Test Circuit
4.9 k
Ω
S1
VCC
OUTPUT
S2
CL = 49 pF
RL = 2 k
Ω
TEST
POINT
OUTPUT
0 V
tPHL
Figure 2. Propagation Delays
1.3 V
1.3 V
0 V
INPUT
tPLH
+ 2.5 V
—
– 2.5 V
S1 AND S2 CLOSED
Figure 3. Enable and Disable Times
OUTPUT A
1.3 V
tPHZ
OUTPUT B
50%
1.3 V
ENABLE INPUT
50%
VOL
VOH
tPZH
tPLZ
tPZL
3 V —
0 V
S1 OPEN
S2 CLOSED
S1 CLOSED
S2 CLOSED
S1 CLOSED
S2 OPEN
S1 CLOSED
S2 CLOSED
0.5 V
0.5 V
TYPICAL APPLICATIONS
Figure 4. Two–Wire Balanced Systems (EIA–422–A)
+
–
DATA
DATA
OUTPUT
ENABLE
MC26C32
MOTOROLA
4
PACKAGE DIMENSIONS
P SUFFIX
PLASTIC DIP
CASE 648–08
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
–A–
B
F
C
S
H
G
D
J
L
M
16 PL
SEATING
1
8
9
16
K
PLANE
–T–
M
A
M
0.25 (0.010)
T
DIM
MIN
MAX
MIN
MAX
MILLIMETERS
INCHES
A
0.740
0.770
18.80
19.55
B
0.250
0.270
6.35
6.85
C
0.145
0.175
3.69
4.44
D
0.015
0.021
0.39
0.53
F
0.040
0.70
1.02
1.77
G
0.100 BSC
2.54 BSC
H
0.050 BSC
1.27 BSC
J
0.008
0.015
0.21
0.38
K
0.110
0.130
2.80
3.30
L
0.295
0.305
7.50
7.74
M
0
10
0
10
S
0.020
0.040
0.51
1.01
_
_
_
_
D SUFFIX
SOG PACKAGE
CASE 751B–05
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
1
8
16
9
SEATING
PLANE
F
J
M
R
X 45
_
G
8 PL
P
–B–
–A–
M
0.25 (0.010)
B
S
–T–
D
K
C
16 PL
S
B
M
0.25 (0.010)
A
S
T
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
9.80
10.00
0.386
0.393
B
3.80
4.00
0.150
0.157
C
1.35
1.75
0.054
0.068
D
0.35
0.49
0.014
0.019
F
0.40
1.25
0.016
0.049
G
1.27 BSC
0.050 BSC
J
0.19
0.25
0.008
0.009
K
0.10
0.25
0.004
0.009
M
0
7
0
7
P
5.80
6.20
0.229
0.244
R
0.25
0.50
0.010
0.019
_
_
_
_
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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does
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associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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MC26C32/D
*MC26C32/D*
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