SN74ALVCH16282
18-BIT TO 36-BIT REGISTERED BUS EXCHANGER
WITH 3-STATE OUTPUTS
SCES036D – JULY 1995 – REVISED MARCH 2000
DBB PACKAGE
(TOP VIEW)
Member of the Texas Instruments
Widebus Family
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
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80
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V
V
CC
CC
2
GND
2B9
1B9
2B8
GND
1B8
2B7
1B7
GND
1B10
2B10
1B11
GND
2B11
1B12
2B12
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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Latch-up Performance Exceeds 250 mA Per
JESD 17
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Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
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V
V
CC
CC
2B6
1B6
2B5
1B5
GND
2B4
1B4
2B3
1B3
1B13
2B13
1B14
2B14
GND
1B15
2B15
1B16
2B16
Packaged in Thin Very Small-Outline
Package
NOTE: For tape and reel order entry:
The DBBR package is abbreviated to GR.
description
The SN74ALVCH16282 is an 18-bit to 36-bit
registered bus exchanger designed for 1.65-V to
3.6-V V
operation.
CC
V
V
CC
CC
GND
2B2
1B2
2B1
1B1
GND
1B17
2B17
1B18
2B18
This device is intended for use in applications in
which data must be transferred from a narrow
high-speed bus to a wide lower-frequency bus. It
is designed specifically for low-voltage (3.3-V)
V
operation.
CC
V
V
CC
A1
CC
The device provides synchronous data exchange
between the two ports. Data is stored in the
internal registers on the low-to-high transition of
the clock (CLK) input. For data transfer in the
B-to-A direction, the select (SEL) input selects 1B
or 2B data for the A outputs.
A18
A17
A16
GND
A15
A14
A13
A2
A3
GND
A4
A5
A6
For data transfer in the A-to-B direction, a
two-stage pipeline is provided in the 1B path, with
a single storage register in the 2B path. Data flow
is controlled by the active-low output enable (OE)
and the DIR input. The DIR control pin is
registered to synchronize the bus direction
changes with the clock.
V
V
CC
A7
CC
A12
A11
A10
GND
OE
A8
A9
GND
CLK
SEL
DIR
Active bus-hold circuitry is provided to hold
unused or floating data inputs at a valid logic level.
The SN74ALVCH16282 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.
Copyright 2000, 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