SN54ABT162825, SN74ABT162825
18-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS474C – JUNE 1994 – REVISED MAY 1997
SN54ABT162825 . . . WD PACKAGE
SN74ABT162825 . . . DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
Output Ports Have Equivalent 25-Ω Series
Resistors, So No External Resistors Are
Required
1OE1
1Y1
1Y2
GND
1Y3
1Y4
1OE2
1A1
1A2
GND
1A3
1A4
1
56
55
54
53
52
51
50
49
48
47
46
45
2
State-of-the-Art EPIC-ΙΙB BiCMOS Design
Significantly Reduces Power Dissipation
3
4
Typical V
(Output Ground Bounce) < 1 V
5
OLP
at V
= 5 V, T = 25°C
6
CC
A
V
V
7
CC
CC
High-Impedance State During Power Up
and Power Down
1Y5
1Y6
1Y7
GND
1Y8
1A5
1A6
1A7
GND
1A8
8
9
Distributed V
Minimizes High-Speed Switching Noise
and GND Pin Configuration
CC
10
11
12
Flow-Through Architecture Optimizes PCB
Layout
1Y9 13
GND 14
GND 15
2Y1 16
44 1A9
43 GND
42 GND
41 2A1
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) Package and
380-mil Fine-Pitch Ceramic Flat (WD)
Package Using 25-mil Center-to-Center
Spacings
17
18
19
20
21
22
23
24
25
26
27
28
40
39
38
37
36
35
34
33
32
31
30
29
2Y2
GND
2Y3
2Y4
2Y5
2A2
GND
2A3
2A4
2A5
description
The ’ABT162825 are 18-bit buffers and line
drivers designed specifically to improve both the
performance and density of 3-state memory
address drivers, clock drivers, and bus-oriented
receivers and transmitters. These devices
provide true data, and can be used as two 9-bit
buffers or one 18-bit buffer.
V
V
CC
CC
2Y6
2Y7
GND
2Y8
2Y9
2A6
2A7
GND
2A8
2A9
2OE1
2OE2
The 3-state control gate is a 2-input AND gate with
active-low inputs so that if either output-enable
(OE1 or OE2) input is high, all nine affected
outputs are in the high-impedance state.
The outputs, which are designed to source or sink up to 12 mA, include equivalent 25-Ω series resistors to
reduce overshoot and undershoot.
When V
is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down.
CC
However, to ensure the high-impedance state above 2.1 V, OE should be tied to V
the minimum value of the resistor is determined by the current-sinking capability of the driver.
through a pullup resistor;
CC
The SN54ABT162825 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABT162825 is characterized for operation from –40°C to 85°C.
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.
Widebus and EPIC-ΙΙB are trademarks of Texas Instruments Incorporated.
Copyright 1997, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
1
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