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74ACT11590DW Datasheet(Hoja de datos) 1 Page - Texas Instruments

No. de Pieza. 74ACT11590DW
Descripción  8-BIT BINART COUNTER WITH REGISTERED 3-STATE OUTPUTS
Descarga  17 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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74ACT11590
8BIT BINARY COUNTER
WITH REGISTERED 3STATE OUTPUTS
SCAS195 − D3989, MARCH 1992 − REVISED APRIL 1993
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
Copyright
1993, Texas Instruments Incorporated
2−1
Inputs Are TTL-Voltage Compatible
Parallel Registered Outputs
Internal Counters Have Direct Clear
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC and GND Configurations
Minimize High-Speed Switching Noise
EPIC (Enhanced-Performance Implanted
CMOS) 1-
µm Process
500-mA Typical Latch-Up Immunity at 125°C
Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
description
The 74ACT11590 contains an 8-bit binary counter that feeds an 8-bit storage register. The storage register has
parallel outputs. Separate clocks are provided for both the binary counter and storage register.
The binary counter features a direct clear (CCLR) input and a count-enable (CCKEN) input. For cascading, a
ripple-carry (RCO) output is provided. Expansion is easily accomplished for two stages by connecting RCO of
the first stage to CCKEN of the second stage. Cascading for larger count chains can be accomplished by
connecting RCO of each stage to CCK of the following stage.
Both the register and the counter have individual positive-edge-triggered clocks. If both clocks are connected
together, the counter state is always one count ahead of the register. Internal circuitry prevents clocking from
the clock enable.
The 74ACT11590 is characterized for operation from − 40
°C to 85°C.
logic symbol
CTR8
C2
13
RCK
12
4
EN3
14
1+
19
CCK
G1
18
CT = 0
17
CCLR
CCKEN
OE
RCO
2D
20
1
2
3
8
9
10
11
3
QA
QB
QC
QD
QE
QF
QG
QH
(CT = 255) Z4
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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.
EPIC is a trademark of Texas Instruments Incorporated.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
QB
QC
QD
GND
GND
GND
GND
QE
QF
QG
QA
CCK
CCKEN
CCLR
VCC
VCC
OE
RCK
RCO
QH
DW OR N PACKAGE
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