SN74ALVCH16952
16-BIT REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES011D – JULY 1995 – REVISED FEBRUARY 1999
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
Member of the Texas Instruments
Widebus Family
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
1OEAB
1CLKAB
1CLKENAB
GND
1OEBA
1
56
2
55 1CLKBA
54 1CLKENBA
53 GND
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
3
4
1A1
5
52 1B1
Latch-Up Performance Exceeds 500 mA Per
JESD 17
1A2
6
51 1B2
V
7
50
V
CC
CC
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
1A3
1A4
1A5
GND
1A6
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
8
49 1B3
48 1B4
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1B5
GND
1B6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Thin Very
Small-Outline (DGV) Packages
description
This 16-bit registered transceiver is designed for
1.65-V to 3.6-V V operation.
CC
The SN74ALVCH16952 contains two sets of
D-type flip-flops for temporary storage of data
flowing in either direction. This device can be used
as two 8-bit transceivers or one 16-bit transceiver.
Data on the A or B bus is stored in the registers on
the low-to-high transition of the clock (CLKAB or
CLKBA) input provided that the clock-enable
(CLKENAB or CLKENBA) input is low. Taking the
output-enable (OEAB or OEBA) input low
accesses the data on either port.
V
V
CC
CC
2A7
2A8
GND
2B7
2B8
GND
2CLKENBA
2CLKBA
2OEBA
2CLKENAB
2CLKAB
2OEAB
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.
Active bus-hold circuitry is provided to hold
unused or floating data inputs at a valid logic level.
The SN74ALVCH16952 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.
Widebus and EPIC 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265