SN54AHCT16541, SN74AHCT16541
16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS339H – MARCH 1996 – REVISED JANUARY 2000
SN54AHCT16541 . . . WD PACKAGE
SN74AHCT16541 . . . DGG, DGV, OR DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
EPIC (Enhanced-Performance Implanted
CMOS) Process
1OE1
1Y1
1Y2
GND
1Y3
1Y4
1OE2
1A1
1A2
GND
1A3
1A4
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
Inputs Are TTL-Voltage Compatible
Distributed V
High-Speed Switching Noise
and GND Pins Minimize
CC
Flow-Through Architecture Optimizes PCB
Layout
V
V
CC
CC
Latch-Up Performance Exceeds 250 mA Per
JESD 17
1Y5
1Y6
1A5
1A6
Package Options Include Plastic Shrink
Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Thin Very
Small-Outline (DGV) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
GND 10
39 GND
1Y7
1Y8
1A7
1A8
11
12
38
37
2Y1 13
2Y2 14
GND 15
2Y3 16
2Y4 17
36 2A1
35 2A2
34 GND
33 2A3
32 2A4
description
V
18
31
V
The ’AHCT16541 devices are noninverting 16-bit
buffers composed of two 8-bit sections with
separate output-enable signals. For either 8-bit
buffer section, the two output-enable (1OE1 and
1OE2or 2OE1and 2OE2)inputsmustbothbelow
for the corresponding Y outputs to be active. If
either output-enable input is high, the outputs of
that 8-bit buffer section are in the high-impedance
state.
CC
CC
2Y5 19
2Y6 20
GND 21
30 2A5
29 2A6
28 GND
2Y7
22
27
2A7
2Y8 23
26 2A8
2OE1 24
25 2OE2
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54AHCT16541 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74AHCT16541 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 8-bit buffer/driver)
INPUTS
OUTPUT
Y
OE2
L
A
L
OE1
L
L
H
Z
Z
L
L
H
X
X
H
X
X
H
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.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
Copyright 2000, 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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