74ACT11593_09 Datasheet, PDF (1/9 Pages) Texas Instruments – 8-BIT BINARY COUNTER WITH PARALLEL-INPUT REGISTERS AND 3-STATE OUTPUTS

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74ACT11593
8ĆBIT BINARY COUNTER
WITH PARALLELĆINPUT REGISTERS AND 3ĆSTATE OUTPUTS
SCAS203 − JUNE 1992 − REVISED APRIL 1993
• Inputs Are TTL-Voltage Compatible
• Parallel Register Inputs/Binary
Counter/3-State Outputs
• Counter Has Direct Overriding Load and
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
DW OR NT PACKAGE
(TOP VIEW)
A/Q_A 1
B/Q_B 2
C/Q_C 3
D/Q_D 4
GND 5
GND 6
GND 7
GND 8
E/Q_E 9
F/Q_F 10
G/Q_G 11
H/Q_H 12
24 CCK
23 CCLR
22 CCKEN
21 CCKEN
20 CLOAD
19 V_CC
18 V_CC
17 OE
16 OE
15 RCK
14 RCK
13 RCO
description
The 74ACT11593 contains eight multiplexed parallel I/Os with 3-state output capability and an 8-bit storage
register that feeds an 8-bit binary counter. Both the register and the counter have individual positive-edge
triggered clocks.
The function tables show the operation of the counter clock-enable (CCKEN, CCKEN) and output-enable
(OE, OE) inputs.
The counter input has direct load and clear functions. A low-going RCO pulse is obtained when the counter
reaches the hex word FF.
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 is accomplished by connecting RCO of each stage to CCK of the
following stage.
The 74ACT11593 is characterized for operation from − 40°C to 85°C.
Function Tables
COUNTER CLOCK ENABLE
INPUTS
CCKEN CCKEN
OUTPUTS
A/QA THRU H/QH
L
L
Disable
L
H
Disable
H
L
Enable
H
H
Disable
OUTPUT ENABLE
INPUTS
OE OE
OUTPUTS
A/QA THRU H/QH
L
L
Input mode
L
H
Input mode
H
L
Output mode
H
H
Input mode
EPIC is a trademark of 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.
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Copyright  1993, Texas Instruments Incorporated
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