Digchip : Database on electronics components
Electronics components database



Details, datasheet, quote on part number: 54ABT646D
 
 
Part number54ABT646D
CategoryInterface and Interconnect => Transceivers
DescriptionOctal Transceivers And Registers With Tri-state Outputs
CompanyNational Semiconductor Corporation
DatasheetDownload 54ABT646D datasheet
Request For QuoteFind where to buy 54ABT646D
 


 
Specifications, Features, Applications
54ABT646 Octal Transceivers and Registers with TRI-STATE Outputs
54ABT646 Octal Transceivers and Registers with TRI-STATE Outputs

The 'ABT646 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 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 transceiver 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 (transparent 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.

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 capability mA n Guaranteed multiple output switching specifications n Output switching specified for both 50 pF and 250 pF loads n Guaranteed simultaneous switching noise level and dynamic threshold performance n Guaranteed latchup protection n High impedance glitch free bus loading during entire power up and power down cycle n Nondestructive hot insertion capability n Standard Microcircuit Drawing (SMD) 5962-9457701

Military 54ABT646W-QML 54ABT646E-QML Package Number E28A 24-Lead Cerpack 28-Lead Ceramic Leadless Chip Carrier, Type C Package Description 24-Lead Ceramic Dual-In-Line

TRI-STATE is a registered trademark of National Semiconductor Corporation.

Pin Names A0A7 B0B7 CPAB, CPBA SAB, SBA OE DIR Select Inputs Output Enable Input Direction Control Input Data Register A Inputs/ TRI-STATE Outputs Data Register B Inputs/ TRI-STATE Outputs Clock Pulse Inputs Description

FIGURE 1. Real Time Transfer B-Bus to A-Bus
Data I/O (Note 1) Output Input Output Input Isolation

Clock An Data into A Register Clock Bn Data into B Register to Bn Real Time (Transparent Mode) Clock An Data into A Register A Register to Bn (Stored Mode) Clock An Data into A Register and Output to An Real Time (Transparent Mode) Clock Bn Data into B Register B Register to An (Stored Mode) Clock Bn Data into B Register and Output to An

H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial

Note 1: The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled; i.e., data at the bus pins will be stored on every LOW-to-HIGH transition of the appropriate clock inputs.




Related products with the same datasheet
54ABT646E-QML   54ABT646F   54ABT646J-QML   54ABT646L   54ABT646W-QML  


Some Part number from the same manufacture National Semiconductor Corporation
54ABT646E-QML Octal Transceivers And Registers With Tri-state Outputs
54ABT652
54AC00 54AC00 - Quad 2-Input NAND Gate, Package: Lcc, Pin Nb=20
54AC00D Quad 2-input NAND Gate
54AC00DM 54AC00 - Quad 2-Input NAND Gate, Package: Lcc, Pin Nb=20
54AC00F Quad 2-input NAND Gate
54AC00LM 54AC00 - Quad 2-Input NAND Gate, Package: Lcc, Pin Nb=20
54AC02 54AC02 - Quad 2-Input NOR GATE, Package: Lcc, Pin Nb=20
54AC02D Quad 2-input NOR GATE
54AC02DM 54AC02 - Quad 2-Input NOR GATE, Package: Lcc, Pin Nb=20
54AC02F Quad 2-input NOR GATE
54AC04 54AC04 - Hex Inverter, Package: Lcc, Pin Nb=20
54AC04D Hex Inverter
54AC04DM 54AC04 - Hex Inverter, Package: Lcc, Pin Nb=20
54AC04F Hex Inverter
54AC04FMQB CD4049UBM - Hex Inverting/non-inverting Buffer Life-time Buy , Package: Cerdip, Pin Nb=16
54AC04L Hex Inverter
54AC05 54AC05 - Hex Inverter, Package: Lcc, Pin Nb=20
54AC05D Hex Inverter With Open Drain Outputs
54AC08 54AC08 - Quad 2-Input And Gate, Package: Lcc, Pin Nb=20
54AC08D Quad 2-input And Gate