SN54AHCT16540, SN74AHCT16540
16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS338H – MARCH 1996 – REVISED JANUARY 2000
SN54AHCT16540 . . . WD PACKAGE
SN74AHCT16540 . . . DGG, DGV, OR DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
EPIC (Enhanced-Performance Implanted
CMOS) Process
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48
47
46
45
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41
40
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38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE1
1Y1
1OE2
1A1
Inputs Are TTL-Voltage Compatible
2
Distributed V
High-Speed Switching Noise
and GND Pins Minimize
3
1Y2
1A2
CC
4
GND
1Y3
GND
1A3
5
Flow-Through Architecture Optimizes PCB
Layout
6
1Y4
1A4
7
V
V
CC
CC
Latch-Up Performance Exceeds 250 mA Per
JESD 17
8
1Y5
1Y6
GND
1Y7
1Y8
2Y1
2Y2
GND
2Y3
2Y4
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
9
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
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11
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16
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23
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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
V
V
CC
CC
2Y5
2Y6
GND
2Y7
2Y8
2A5
2A6
GND
2A7
2A8
description
These 16-bit buffers and bus drivers provide a
high-performance bus interface for wide data
paths.
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 corresponding
outputs are in the high-impedance state.
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 SN54AHCT16540 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74AHCT16540 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 8-bit buffer/driver)
INPUTS
OUTPUT
Y
A
L
OE1
L
OE2
L
H
L
L
L
H
X
X
H
X
Z
Z
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.
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