SN74LVCH16652A
16-BIT BUS TRANSCEIVER AND REGISTER
WITH 3-STATE OUTPUTS
SCAS319G – NOVEMBER 1993 – REVISED JUNE 1998
DGG OR DL PACKAGE
(TOP VIEW)
Member of the Texas Instruments
Widebus Family
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
1OEAB
1CLKAB
1SAB
GND
1OEBA
1CLKBA
1SBA
GND
1B1
1B2
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
2
Typical V
< 0.8 V at V
(Output Ground Bounce)
OLP
3
= 3.3 V, T = 25°C
CC
A
4
Typical V
> 2 V at V
(Output V
Undershoot)
OHV
CC
OH
1A1
1A2
5
= 3.3 V, T = 25°C
A
6
Power Off Disables Outputs, Permitting
Live Insertion
V
V
7
CC
CC
1A3
1A4
1A5
GND
1A6
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
1B3
1B4
1B5
GND
1B6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
8
9
Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
10
11
12
13
14
15
16
17
18
19
20
21
22
3.3-V V
)
CC
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages
V
V
CC
CC
2A7 23
2A8 24
34 2B7
33 2B8
description
GND 25
32 GND
31 2SBA
30 2CLKBA
29 2OEBA
2SAB 26
2CLKAB 27
2OEAB 28
This 16-bit bus transceiver and register is
designed for 1.65-V to 3.6-V V operation.
CC
The SN74LVCH16652A consists of D-type
flip-flops and control circuitry arranged for
multiplexed transmission of data directly from the
data bus or from the internal storage registers.
The device can be used as two 8-bit transceivers
or one 16-bit transceiver.
Complementary output-enable (OEAB and OEBA) inputs control the transceiver functions. Select-control (SAB
and SBA) inputs select whether real-time or stored data is transferred. A low input level selects real-time data,
and a high input level selects stored data. The circuitry used for select control eliminates the typical decoding
glitch that occurs in a multiplexer during the transition between stored and real-time data. Figure 1 illustrates
the four fundamental bus-management functions that can be performed with the SN74LVCH16652A.
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 1998, 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