74AC11590
8-BIT BINARY COUNTER
WITH REGISTERED 3-STATE OUTPUTS

SCAS194 - D3988, MARCH 1992 - REVISED APRIL 1993

features

• 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^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 74AC11590 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 () output is provided. Expansion is easily accomplished for two stages by connecting of the first stage to CCKEN\ of the second stage. Cascading for larger count chains can be accomplished by connecting 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 74AC11590 is characterized for operation from -40°C to 85°C.