SN54AHCT16541, SN74AHCT16541
16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS339H – MARCH 1996 – REVISED JANUARY 2000
D
D
D
D
D
D
D
Members of the Texas Instruments
Widebus
™
Family
EPIC
™
(Enhanced-Performance Implanted
CMOS) Process
Inputs Are TTL-Voltage Compatible
Distributed V
CC
and GND Pins Minimize
High-Speed Switching Noise
Flow-Through Architecture Optimizes PCB
Layout
Latch-Up Performance Exceeds 250 mA Per
JESD 17
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
SN54AHCT16541 . . . WD PACKAGE
SN74AHCT16541 . . . DGG, DGV, OR DL PACKAGE
(TOP VIEW)
description
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
1OE2 or 2OE1 and 2OE2) inputs must both be low
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.
1OE1
1Y1
1Y2
GND
1Y3
1Y4
V
CC
1Y5
1Y6
GND
1Y7
1Y8
2Y1
2Y2
GND
2Y3
2Y4
V
CC
2Y5
2Y6
GND
2Y7
2Y8
2OE1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE2
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE2
To ensure the high-impedance state during power up or power down, OE should be tied to V
CC
through a pullup
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
OE1
L
L
H
X
OE2
L
L
X
H
A
L
H
X
X
OUTPUT
Y
L
H
Z
Z
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.
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.
POST OFFICE BOX 655303
Copyright
©
2000, Texas Instruments Incorporated
•
DALLAS, TEXAS 75265
1
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