SN54HC590A 8-Bit Binary Counters With 3-State Output Registers | TI.com

SN54HC590A
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8-Bit Binary Counters With 3-State Output Registers

8-Bit Binary Counters With 3-State Output Registers - SN54HC590A
Datasheet
 

Description

The 'HC590A devices 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 direct clear (CCLR)\ and count-enable (CCKEN)\ inputs. A ripple-carry output (RCO)\ is provided for cascading. Expansion is accomplished easily 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 the counter clock (CCLK) input of the following stage.

CCLK and the register clock (RCLK) inputs are positive-edge triggered. If both clocks are connected together, the counter state always is one count ahead of the register. Internal circuitry prevents clocking from the clock enable.

Features

  • 2-V to 6-V VCC Operation
  • High-Current 3-State Parallel Register Outputs Can Drive Up to 15 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 14 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • 8-Bit Counter With Register
  • Counter Has Direct Clear

Parametrics

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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
SN54HC590A Order now HC     2     6     8     3.3
5    
28     0.08     38     7.8     -7.8     Counter     Binary     Military     -55 to 125     CDIP | 16
CFP | 16
LCCC | 20    
SN74HC590A Order now HC     2     6     8     3.3
5    
28     0.08     38     7.8     -7.8     Counter     Binary     Catalog     -40 to 85     PDIP | 16
SOIC | 16
SOIC | 16