SN74ALVCH162835
18-BIT UNIVERSAL BUS DRIVER
WITH 3-STATE OUTPUTS
SCES121E – JULY 1997 – REVISED JUNE 1999
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
Member of the Texas Instruments
Widebus Family
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
1
56
55
54
53
52
51
50
49
48
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46
45
44
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40
39
38
37
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32
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NC
NC
Y1
GND
Y2
Y3
GND
NC
A1
GND
A2
A3
2
Output Port Has Equivalent 26-Ω Series
Resistors, So No External Resistors Are
Required
3
4
5
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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7
V
V
CC
Y4
CC
8
A4
A5
A6
GND
A7
9
Y5
Y6
GND
Y7
Y8
Y9
Y10
Y11
Y12
GND
Y13
Y14
Y15
Latch-Up Performance Exceeds 250 mA Per
JESD 17
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11
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16
17
18
19
20
21
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23
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26
27
28
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
A8
A9
Package Options Include Plastic Shrink
Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Thin Very
A10
A11
A12
GND
A13
A14
A15
Small-Outline (DGV) Packages
NOTE: For tape and reel order entry:
The DGGR package is abbreviated to GR, and
the DGVR package is abbreviated to VR.
description
V
V
CC
CC
Y16
Y17
GND
Y18
OE
A16
A17
GND
A18
CLK
GND
This 18-bit universal bus driver is designed for
1.65-V to 3.6-V V
operation.
CC
Data flow from A to Y is controlled by the
output-enable (OE) input. The device operates in
the transparent mode when the latch-enable (LE)
input is high. When LE is low, the A data is latched
if the clock (CLK) input is held at a high or low logic
level. If LE is low, the A data is stored in the
latch/flip-flop on the low-to-high transition of CLK.
When OE is high, the outputs are in the
high-impedance state.
LE
NC – No internal connection
The output port includes equivalent 26-Ω series resistors to reduce overshoot and undershoot.
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.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH162835 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.
EPIC and Widebus are trademarks of Texas Instruments Incorporated.
Copyright 1999, Texas Instruments Incorporated
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.
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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265