74AC11593 Datasheet, PDF (1/11 Pages) Texas Instruments – 8-BIT BINARY COUNTER WITH 3-STATE I/O INPUT REGISTERS

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• Parallel 3-State I/O: Register Inputs/
Counter 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
• EPICt (Enhanced-Performance Implanted
CMOS) 1-mm Process
• 500-mA Typical Latch-Up Immunity
at 125°C
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
74AC11593
8ĆBIT BINARY COUNTER
WITH 3ĆSTATE I/O INPUT REGISTERS
SCAS202 − MARCH 1992 − REVISED APRIL 1993
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 74AC11953 consists of a parallel input, an 8-bit storage register feeding an 8-bit counter, and a 3-state I/O
which provides parallel count outputs. 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. A register clock-enable (RCK) input is also provided.
The counter (RCO) input has direct load and clear functions. A low-going RCO pulse will be 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 can be accomplished by
connecting RCO of each stage to CCK of the following stage.
The 74AC11593 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
L
H
H
L
H
H
Enable
Disable
Enable
Enable
OUTPUT ENABLE
INPUTS
OE
OE
OUTPUTS
A/QA THRU H/QH
L
L
L
H
H
L
H
H
Input mode
Input mode
Output mode
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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