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Details, datasheet, quote on part number:SN74AS879
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| Part: | SN74AS879 |
| Category: | Logic => Flip-Flops => Bipolar->AS Family |
| Description: | Dual 4-bit D-type Edge-triggered Flip-flop With 3-state Output |
| Company: | Texas Instruments, Inc. |
| Datasheet: | Download SN74AS879 datasheet File size : 107 kB |
| Request For quote: | Find where to buy SN74AS879
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Datasheet text preview:
SN54ALS878A, SN54ALS879A, SN54AS878, SN54AS879 SN74ALS878A, SN74ALS879A, SN74AS878, SN74AS879 DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS062A D2661, APRIL 1982 REVISED MAY 1986
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3-State Bus Driving Outputs Full Parallel-Access for Loading Buffered Control Inputs Choice of True or Inverting Logic 'ALS878A, 'AS878 True Outputs 'ALS879A, 'AS879 Inverting Outputs Synchronous Clear Package Options Include Plastic Small Outline Packages, Both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs Dependable Texas Instruments Quality and Reliability
SN54ALS878A, SN54AS878 . . . JT PACKAGE SN74ALS878A, SN74AS878 . . . DW OR NT PACKAGE (TOP VIEW) 1CLR 1OC 1D1 1D2 1D3 1D4 2D1 2D2 2D3 2D4 2OC GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC 1CLK 1Q1 1Q2 1Q3 1Q4 2Q1 2Q2 2Q3 2Q4 2CLK 2CLR
SN54ALS878A, SN54AS878 . . . FK PACKAGE SN74ALS878A, SN74AS878 . . . FN PACKAGE (TOP VIEW) 1D1 1OC 1CLR NC VCC 1CLK 1Q1 1D2 1D3 1D4 NC 2D1 2D2 2D3
4 3 2 1 28 27 26 5 25 6 24 7 23 8 22 9 21 10 20 11 19 121314 15 16 1718
description
These dual 4-bit registers feature 3-state outputs designed specifically for bus driving. This makes these devices particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The dual 4-bit edge-triggered flip-flops enter data on the low-to-high transition of the clock (1CLK and 2CLK). All types have individual synchronous clear inputs and output control pins for each group of 4-bit registers. The SN54ALS' and SN54AS' devices are characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS' and SN74AS' devices are characterized for operation from 0°C to 70°C.
1Q2 1Q3 1Q4 NC 2Q1 Q22 2Q3
SN54ALS879A, SN54AS879 . . . JT PACKAGE SN74ALS879A, SN74AS879 . . . DW OR NT PACKAGE (TOP VIEW) 1CLR 1 24 VCC 1OC 2 23 1CLK 1D1 3 22 1Q1 1D2 4 21 1Q2 1D3 5 20 1Q3 1D4 6 19 1Q4 2D1 7 18 2Q1 2D2 8 17 2Q2 2D3 9 16 2Q3 2D4 10 15 2Q4 2OC 11 14 2CLK GND 12 13 2CLR SN54ALS879A, SN54AS879 . . . FK PACKAGE SN74ALS879A, SN74AS879 . . . FN PACKAGE (TOP VIEW) 1D1 1OC 1CLR NC VCC 1CLK 1Q1 1D2 1D3 1D4 NC 2D1 2D2 2D3
4 3 2 1 28 27 26 5 25 6 24 7 23 8 22 9 21 10 20 11 19 121314 15 16 17 18
2D4 2OC GND NC 2CLR 2CLK 2Q4 1Q2 1Q3 1Q4 NC 2Q1 2Q2 2Q3 NC No internal connection
Copyright © 1986, 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.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
2D4 2OC GND NC 2CLR 2CLK 2G4
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SN54ALS878A, SN54ALS879A, SN54AS878, SN54AS879 SN74ALS878A, SN74ALS879A, SN74AS878, SN74AS879 DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS062A D2661, APRIL 1982 REVISED MAY 1986
FUNCTION TABLES
'ALS878A, 'AS878 (each flip-flop) INPUTS OC L L L L H CLR CLK L H H H X L X D X H L X X OUTPUT Q L H L Q0 Z OC L L L L H 'ALS879A, 'AS879 (each flip-flop) INPUTS CLR CLK L H H H X L X D X H L X X OUTPUT Q H L H Q0 Z
logic symbols
'ALS878A, 'AS878 2 1OC 23 1CLK 1 1CLR 3 1D1 4 1D2 5 1D3 6 1D4 11 2OC 14 2CLK 13 2CLR 7 2D1 8 2D2 9 2D3 10 2D4 EN C1 1R 1D 22 21 20 19 1Q1 1Q2 1Q3 1Q4 2 1OC 23 1CLK 1 1CLR 3 1D1 4 1D2 5 1D3 6 1D4 11 2OC 14 2CLK 13 2CLR 18 17 16 15 2Q1 2Q2 2Q3 2Q4 7 2D1 8 2D2 9 2D3 10 2D4 'ALS879A, 'AS879 EN C1 1R 1D 22 21 20 19 1Q1 1Q2 1Q3 1Q4
EN C1 1R 1D
EN C1 1R 1D 18 17 16 15 2Q1 2Q2 2Q3 2Q4
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for DW, JT, and NT packages.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS878A, SN54ALS879A SN74ALS878A, SN74ALS879A DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS WITH 3-STATE OUTPUTS
SDAS062A D2661, APRIL 1982 REVISED MAY 1986
logic diagrams (positive logic)
'ALS878A, 'AS878 (each quad flip-flop) OC CLK CLR Q1 D1 C1 1D D1 C1 1D OC CLK CLR Q1 'ALS879A, 'AS879 (each quad flip-flop)
Q2 D2 C1 1D D2 C1 1D
Q2
Q3 D3 C1 1D D3 C1 1D
Q3
Q4 D4 C1 1D D4 C1 1D
Q4
Pin numbers shown are for DW, JT, and NT packages.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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