54abt16646 National Semiconductor Corporation, 54abt16646 Datasheet

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54abt16646

Manufacturer Part Number
54abt16646
Description
16-bit Transceivers And Registers With Tri-state Outputs
Manufacturer
National Semiconductor Corporation
Datasheet
© 2004 National Semiconductor Corporation
54ABT16646
16-Bit Transceivers and Registers with TRI-STATE
Outputs
General Description
The ’ABT16646 consists of bus transceiver circuits with
TRI-STATE, D-type flip-flops, and control circuitry arranged
for multiplexed transmission of data directly from the input
bus or from the internal registers. Data on the A or B bus will
be clocked into the registers as the appropriate clock pin
goes to a high logic level. Control OE and direction pins are
provided to control the transceiver function. In the trans-
ceiver mode, data present at the high impedance port may
be stored in either the A or the B register or in both. The
select controls can multiplex stored and real-time (transpar-
ent mode) data. The direction control determines which bus
will receive data when the enable control OE is Active LOW.
In the isolation mode (control OE HIGH), A data may be
stored in the B register and/or B data may be stored in the A
register.
Ordering Code
Logic Symbol
TRI-STATE
54ABT16646W-QML
®
is a registered trademark of National Semiconductor Corporation.
Military
WA56A
Package
Number
DS100226
DS100226-1
56-Lead Cerpack
Features
n Independent registers for A and B buses
n Multiplexed real-time and stored data
n A and B output sink capability of 48 mA, source
n Guaranteed latchup protection
n High impedance glitch free bus loading during entire
n Nondestructive hot insertion capability
n Standard Microcircuit Drawing (SMD) 5962-9450202
A
B
CPAB
SAB
OE
DIR
capability of 24 mA
power up and power down cycle
0
0
–A
–B
n
n
Pin Names
15
15
, SBA
n
, CPBA
Package Description
n
n
Data Register A Inputs/
TRI-STATE Outputs
Data Register B Inputs/
TRI-STATE Outputs
Clock Pulse Inputs
Select Inputs
Output Enable Input
Direction Control Input
Description
®
www.national.com
July 1998

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54abt16646 Summary of contents

Page 1

... OE is Active LOW. In the isolation mode (control OE HIGH), A data may be stored in the B register and/or B data may be stored in the A register. Ordering Code Military 54ABT16646W-QML Logic Symbol TRI-STATE is a registered trademark of National Semiconductor Corporation. ® © 2004 National Semiconductor Corporation ...

Page 2

Connection Diagram Real Time Transfer A-Bus to B-Bus DS100226-3 FIGURE 1. Real Time Transfer B-Bus to A-Bus DS100226-4 FIGURE 2. www.national.com Pin Assignment for Cerpack DS100226-2 2 Storage from Bus to Register DS100226-5 FIGURE 3. Transfer from Register to Bus ...

Page 3

Function Table Inputs OE DIR CPAB CPBA SAB ...

Page 4

Logic Diagram www.national.com 4 ...

Page 5

Absolute Maximum Ratings Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias Ceramic V Pin Potential to CC Ground Pin Input Voltage (Note 3) Input Current (Note 3) Voltage Applied to Any Output in the Disable or Power-Off State ...

Page 6

DC Electrical Characteristics < Note 4: For 8-bit toggling, I 1.4 mA/MHz. CCD Note 5: Guaranteed but not tested. Sym- Parameter bol V Quiet Output Maximum Dynamic V OLP V Quiet Output Minimum Dynamic V OLV Note 6: Max number ...

Page 7

Capacitance (Continued) Note measured at frequency MHz, per MIL-STD-883B, Method 3012. I/O AC Loading *Includes jig and probe capacitance FIGURE 5. Standard AC Test Load FIGURE 1.5V M Input Pulse Requirements ...

Page 8

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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