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SN74ACT1071 Datasheet Preview

SN74ACT1071 Datasheet

10-BIT BUS-TERMINATION ARRAY

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Designed to Ensure Defined Voltage Levels
on Floating Bus Lines in CMOS Systems
Reduces Undershoot and Overshoot
Caused By Line Reflections
Repetitive Peak Forward
Current . . . IFRM = 100 mA
Inputs Are TTL-Voltage Compatible
Low Power Consumption (Like CMOS)
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model
(C = 200 pF, R = 0)
Center-Pin VCC and GND Configuration
Minimizes High-Speed Switching Noise
SN74ACT1071
10-BIT BUS-TERMINATION ARRAY
WITH BUS-HOLD FUNCTION
SCAS192 – D3994, MARCH 1992 – REVISED APRIL 1993
D PACKAGE
(TOP VIEW)
D1 1
D2 2
GND 3
GND 4
D3 5
D4 6
D5 7
14 D10
13 D9
12 D8
11 VCC
10 VCC
9 D7
8 D6
description
This device is designed to terminate bus lines in CMOS systems. The integrated low-impedance diodes clamp
the voltage of undershoots and overshoots caused by line reflections and ensure signal integrity. The device
also contains a bus-hold function that consists of a CMOS-buffer stage with a high-resistance feedback path
between its output and its input. The SN74ACT1071 prevents bus lines from floating without using pullup or
pulldown resistors.
The high-impedance inputs of these internal buffers are connected to the input terminals of the device. The
feedback path on each internal buffer stage keeps a bus line tied to the bus holder at the last valid logic state
generated by an active driver before the bus switches to the high-impedance state.
The SN74ACT1071 is characterized for operation from – 40°C to 85°C.
logic diagram, one of ten channels (positive logic)
D1 1
VCC 11
VCC 10
TG
GND 3
4
GND
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
4–1




etcTI

SN74ACT1071 Datasheet Preview

SN74ACT1071 Datasheet

10-BIT BUS-TERMINATION ARRAY

No Preview Available !

SN74ACT1071
10-BIT BUS-TERMINATION ARRAY
WITH BUS-HOLD FUNCTION
SCAS192 – D3994, MARCH 1992 – REVISED APRIL 1993
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC + 0.5 V
Continuous input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 20 mA
Positive-peak input clamp current, IIK (VI > VCC) (tw < 1 µs, duty cycle < 20%) . . . . . . . . . . . . . . . . . 100 mA
Negative-peak input clamp current, IIK (VI < 0) (tw < 1 µs, duty cycle < 20%) . . . . . . . . . . . . . . . . . . –100 mA
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.
NOTE 1: The input negative-voltage rating may be exceeded if the input clamp-current rating is observed.
recommended operating conditions
VCC
VIH
VIL
VI
TA
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
Operating free-air temperature
MIN MAX UNIT
4.5 5.5 V
2.5
V
0.8 V
0 VCC V
– 40
85 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TA = 25°C
MIN TYP†
MIN
MAX
MAX UNIT
IIL
VCC = 4.5 to 5.5 V,
VI = 0.8 V
0.15 0.3
0.9 0.1
1 mA
IIH
VCC = 4.5 to 5.5 V,
VI = 2.5 V
– 0.2 – 0.5 –1.4 – 0.15 –1.5 mA
VIKL
IIN = –18 mA
–1.5
–1.5 V
VIKH
ICC‡
ICC§
IIN = 18 mA
VCC = 5.5 V,
One input at 3.4 V,
Inputs open
Other inputs at VCC or GND
VCC + 2
4
0.9
VCC + 2 V
40 µA
1 mA
Ci
VI = VCC or GND
3
pF
All typical values are at VCC = 5 V.
Inputs may be set high or low prior to the ICC measurement.
§ This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.
4–2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN74ACT1071
Description 10-BIT BUS-TERMINATION ARRAY
Maker etcTI
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