SN74LS590 8-Bit Binary Counters With Output Registers And 3-State Outputs | TI.com

SN74LS590
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8-Bit Binary Counters With Output Registers And 3-State Outputs

8-Bit Binary Counters With Output Registers And 3-State Outputs - SN74LS590
Datasheet
 

Description

These devices each contain 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 input CCLR\ and a count enable input CCKEN\. For cascading, a ripple carry output RCO\ 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 counter and register clocks are positive-edge triggered. If the user wishes to connect both clocks together, the counter state will always be one count ahead of the register. Internal circuitry prevents clocking from the clock enable.

 

Features

  • 8-Bit Counter with Register
  • Parallel Register Outputs
  • Choice of 3-State ('LS590) or Open-Collector ('LS591) Register Outputs
  • Guaranteed Counter Frequency:DC to 20 MHz

 

Parametrics

Compare all products in Counter/arithmetic/parity function Email Download to Excel
Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) Function Type Rating Operating temperature range (C) Package Group
SN74LS590 Order now LS     4.75     5.25     8     5     35     65     45     24     -2.6     Counter     Binary     Catalog     0 to 70     PDIP | 16
SOIC | 16
SO | 16    
SN54LS590 Samples not available LS     4.75     5.25     8     5     35     65     45     24     -2.6     Counter     Binary     Military     -55 to 125     CDIP | 16
LCCC | 20