AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Meet or Exceed the Requirements of
TIA/EIA-422-B and ITU Recommendation
V.11
D
Low Power, ICC = 100 µA Typ
D
Operate From a Single 5-V Supply
D
High Speed, tPLH = tPHL = 7 ns Typ
D
Low Pulse Distortion, tsk(p) = 0.5 ns Typ
D
High Output Impedance in Power-Off
Conditions
D
Improved Replacement for AM26LS31
description
The AM26C31C, AM26C31I, and AM26C31M are
four complementary-output line drivers designed
to meet the requirements of TIA/EIA-422-B and
ITU (formerly CCITT). The 3-state outputs have
high-current capability for driving balanced lines,
such as twisted-pair or parallel-wire transmission
lines, and they provide the high-impedance state
in the power-off condition. The enable function is
common to all four drivers and offers the choice of
an active-high or active-low enable input.
BiCMOS circuitry reduces power consumption
without sacrificing speed.
The AM26C31C is characterized for operation
from 0°C to 70°C, the AM26C31I is characterized
for operation from –40°C to 85°C, and the
AM26C31M is characterized for operation from
–55°C to 125°C.
FUNCTION TABLE
(each driver)
INPUT ENABLES OUTPUTS
AG G Y Z
H H X H L
L H XLH
H XLHL
L XLLH
X LHZZ
H = high level, L = low level, X = irrelevant,
Z = high impedance (off)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1A
1Y
1Z
G
2Z
2Y
2A
GND
VCC
4A
4Y
4Z
G
3Z
3Y
3A
AM26C31C, AM26C31I . . . D, DB†, OR N PACKAGE
AM26C31M ...J OR W PACKAGE
(TOP VIEW)
AM26C31M . . . FK PACKAGE
(TOP VIEW)
†The DB package is only available left-ended taped
(order AM26C31IDBLE or AM26C31CDBLE).
NC – No internal connection
3212019
910111213
4
5
6
7
8
18
17
16
15
14
4Y
4Z
NC
G
3Z
1Z
G
NC
2Z
2Y
1Y
1A
NC
3A
3Y 4A
2A
GND
NC CC
V
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 1998, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol†
4Z
4Y
3Z
3Y
2Z
2Y
1Z
1Y
4A
3A
2A
1A
G
G
13
14
11
10
5
6
3
2
15
9
7
1
12
4≥ 1
EN
†This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
The terminal numbers shown are for the D, DB, J, N, and W packages.
logic diagram (positive logic)
4Z
4Y
3Z
3Y
2Z
2Y
1Z
1Y
13
14
11
10
5
6
3
2
4A
3A
2A
1A
G
G
15
9
7
1
12
4
schematics of inputs and outputs
Input
VCC
TYPICAL OF ALL OUTPUTS
Output
VCC
GND GND
EQUIVALENT OF EACH INPUT
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC (see Note 1) –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI –0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential input voltage range, VID –14 V to 14 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input or output clamp current, IIK or IOK ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current, IO ±150 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VCC current 200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GND current –200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°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 af fect device reliability.
NOTE 1: All voltage values, except differential output voltage (VOD), are with respect to the network ground terminal.
DISSIPATION RATING TABLE
PACKAGE TA ≤ 25°C
POWER RATING DERATING FACTOR
ABOVE TA = 25°CTA = 70°C
POWER RATING TA = 85°C
POWER RATING TA = 125°C
POWER RATING
D
DB
N
FK
J
W
950 mW
781 mW
1150 mW
1375 mW
1375 mW
1000 mW
7.6 mW/°C
6.2 mW/°C
9.2 mW/°C
11 mW/°C
11 mW/°C
8.0 mW/°C
608 mW
502 mW
736 mW
—
—
—
494 mW
409 mW
598 mW
—
—
—
—
—
—
275 mW
275 mW
200 mW
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, VCC 4.5 5 5.5 V
Differential input voltage, VID ±7 V
High-level input voltage, VIH 2 V
Low-level input voltage, VIL 0.8 V
High-level output current, IOH –20 mA
Low-level output current, IOL 20 mA
AM26C31C 0 70
Operating free-air temperature, TAAM26C31I –40 85 °C
AM26C31M –55 125
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS AM26C31C
AM26C31I UNIT
MIN TYP†MAX
VOH High-level output voltage IO = –20 mA 2.4 3.4 V
VOL Low-level output voltage IO = 20 mA 0.2 0.4 V
|VOD|Differential output voltage magnitude 2 3.1 V
∆|VOD|Change in magnitude of differential output voltage‡
RL= 100 Ω
See Figure 1
±0.4 V
VOC Common-mode output voltage
R
L =
100
Ω
,
See
Fig
u
re
1
3 V
∆|VOC|Change in magnitude of common-mode output voltage‡±0.4 V
IIInput current VI = VCC or GND ±1µA
IO( ff)
Driver out
p
ut current with
p
ower off
VCC = 0, VO = 6 V 100
µA
I
O(off)
Dri
v
er
o
u
tp
u
t
c
u
rrent
w
ith
po
w
er
off
VCC = 0, VO = –0.25 V –100 µ
A
IOS Driver output short-circuit current VO = 0 –30 –150 mA
IOZ
High im
p
edance off state out
p
ut current
VO = 2.5 V 20 µA
I
OZ
High
-
impedance
off
-
state
o
u
tp
u
t
c
u
rrent
VO = 0.5 V –20 µA
IO = 0, VI = 0 V or 5 V 100 µA
ICC Quiescent supply current I
O
= 0, V
I
= 2.4 V or 0.5 V,
15
3
mA
O,
See Note 2
I,
1
.
5
3
mA
CiInput capacitance 6 pF
†All typical values are at VCC = 5 V and TA = 25°C.
‡∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively , that occur when the input is changed from a high level to a low
level.
NOTE 2: This parameter is measured per input. All other inputs are at 0 or 5 V.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS AM26C31C
AM26C31I UNIT
MIN TYP†MAX
tPLH Propagation delay time, low- to high-level output 3 7 12 ns
tPHL Propagation delay time, high- to low-level output S1 is open, See Figure 2 37 12 ns
tsk(p) Pulse skew time (|tPLH – tPHL|) 0.5 4 ns
tr(OD), tf(OD) Differential output rise and fall times S1 is open, See Figure 3 5 10 ns
tPZH Output enable time to high level 10 19 ns
tPZL Output enable time to low level
S1 is closed
See Figure 4
10 19 ns
tPHZ Output disable time from high level
S1
is
closed
,
See
Fig
u
re
4
7 16 ns
tPLZ Output disable time from low level 7 16 ns
Cpd Power dissipation capacitance (each driver) (see
Note 3) S1 is open, See Figure 2 170 pF
†All typical values are at VCC = 5 V and TA = 25°C.
NOTE 3: Cpd is used to estimate the switching losses according to PD = Cpd × VCC2 × f, where f is the switching frequency.
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
AM26C31M
UNIT
PARAMETER
MIN TYP†MAX
UNIT
VOH High-level output voltage IO = –20 mA 2.2 3.4 V
VOL Low-level output voltage IO = 20 mA 0.2 0.4 V
|VOD|Differential output voltage magnitude 2 3.1 V
∆|VOD|Change in magnitude of differential
output voltage‡
RL= 100 Ω
See Figure 1
±0.4 V
VOC Common-mode output voltage
R
L =
100
Ω
,
See
Fig
u
re
1
3 V
∆|VOC|Change in magnitude of common-mode
output voltage‡±0.4 V
IIInput current VI = VCC or GND ±1µA
IO( ff)
Driver out
p
ut current with
p
ower off
VCC = 0, VO = 6 V 100
µA
I
O(off)
Dri
v
er
o
u
tp
u
t
c
u
rrent
w
ith
po
w
er
off
VCC = 0, VO = –0.25 V –100 µ
A
IOS Driver output short-circuit current VO = 0 –170 mA
IOZ
High im
p
edance off state out
p
ut current
VO = 2.5 V 20 µA
I
OZ
High
-
impedance
off
-
state
o
u
tp
u
t
c
u
rrent
VO = 0.5 V –20 µA
ICC
Quiescent su
pp
ly current
IO = 0, VI = 0 V or 5 V 100 µA
I
CC
Q
u
iescent
s
u
ppl
y
c
u
rrent
IO = 0, VI = 2.4 V or 0.5 V, See Note 2 3.2 mA
CiInput capacitance 6 pF
†All typical values are at VCC = 5 V and TA = 25°C.
‡∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively , that occur when the input is changed from a high level to a low
level.
NOTE 2: This parameter is measured per input. All other inputs are at 0 V or 5 V.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
AM26C31M
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP†MAX
UNIT
tPLH Propagation delay time, low- to high-level output 7 12 ns
tPHL Propagation delay time, high- to low-level output S1 is open, See Figure 2 6.5 12 ns
tsk(p) Pulse skew time (|tPLH – tPHL|) 0.5 4 ns
tr(OD), tf(OD) Differential output rise and fall times S1 is open, See Figure 3 5 12 ns
tPZH Output enable time to high level 10 19 ns
tPZL Output enable time to low level
S1 is closed
See Figure 4
10 19 ns
tPHZ Output disable time from high level
S1
is
closed
,
See
Fig
u
re
4
7 16 ns
tPLZ Output disable time from low level 7 16 ns
Cpd Power dissipation capacitance (each driver) (see
Note 3) S1 is open, See Figure 2 100 pF
†All typical values are at VCC = 5 V and TA = 25°C.
NOTE 3: Cpd is used to estimate the switching losses according to PD = Cpd × VCC2 × f, where f is the switching frequency.
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
RL/2
VOC
RL/2
VOD2
Figure 1. Differential and Common-Mode Output Voltages
Input A
(see Note B)
Output Y
1.3 V
50% 50%
tsk(p)
Output Z 50% 50%
tPHL tPLH
tsk(p)
tPLH tPHL
C3
40 pF
C2
40 pF
C1
40 pF
Input
See Note A
TEST CIRCUIT
RL/2
RL/2
1.5 V
500 Ω
S1
1.3 V
1.3 V
NOTES: A. C1, C2, and C3 include probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, duty cycle ≤ 50%, and tr tf ≤ 6 ns.
3 V
0 V
Figure 2. Propagation Delay Time and Skew Waveforms and Test Circuit
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
Input A
(see Note B)
Differential
Output
3 V
0 V
90% 90%
10% 10%
tr(OD) tf(OD)
C3
40 pF
C2
40 pF
C1
40 pF
Input
See Note A
TEST CIRCUIT
RL/2
RL/2
1.5 V
500 Ω
S1
VOLTAGE WAVEFORMS
NOTES: A. C1, C2, and C3 include probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, duty cycle ≤ 50%, and tr, tf ≤ 6 ns.
Figure 3. Differential Output Rise and Fall Time Waveforms and Test Circuit
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
8POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
Enable G Input
(see Note C)
Output WIth
0 V to A Input
1.3 V
VOL + 0.3 V 0.8 V
tPLZ
2 V
tPHZ tPZH
1.3 V
tPZL
C3
40 pF
C2
40 pF
C1
40 pF
Input A
50 Ω
50 Ω
500 Ω
TEST CIRCUIT
VOLTAGE WAVEFORMS
3 V
0 V
1.5 V
VOL
VOH
VOH – 0.3 V 1.5 V
See Note A
G
G
Enable G Input
Output
Output
Output WIth
3 V to A Input
Inputs
(see Note B)
0 V
3 V 1.5 V
S1
NOTES: A. C1, C2, and C3 includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, duty cycle ≤ 50%, tr < 6 ns, and
tf < 6 ns.
C. Each enable is tested separately .
Figure 4. Output Enable and Disable Time Waveforms and Test Circuit
AM26C31C, AM26C31I, AM26C31M
QUADRUPLE DIFFERENTIAL LINE DRIVERS
SLLS103G – DECEMBER 1990 – REVISED SEPTEMBER 1998
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
150
100
50
00 5 10 15 20 25
IDD – Supply Current – mA
200
250
SUPPLY CURRENT
vs
SWITCHING FREQUENCY
300
30 35 40
f – Switching Frequency – MHz
ÁÁ
ÁÁ
ICC
VCC = 5 V
TA = 25°C
See Figure 2
S1 Open
All Four Channels Switching Simultaneously
N Package
Figure 5
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TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
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Copyright 1998, Texas Instruments Incorporated