74AC11593
8-BIT BINARY COUNTER
WITH 3-STATE I/O INPUT REGISTERS

SCAS202 - MARCH 1992 - REVISED APRIL 1993

features

• 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
• EPIC^TM (Enhanced-Performance Implanted CMOS) 1-m Process
• 500-mA Typical Latch-Up Immunity at 125°C
• Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs

EPIC is a trademark of Texas Instruments Incorporated.

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,) inputs. A register clock-enable (RCK\) input is also provided.

The counter () input has direct load and clear functions. A low-goingpulse will be obtained when the counter reaches the hex word FF. Expansion is easily accomplished for two stages by connectingof the first stage to CCKEN\ of the second stage. Cascading for larger count chains can be accomplished by connectingof each stage to CCK of the following stage.

The 74AC11593 is characterized for operation from - 40°C to 85°C.