74AC11590

`Supply voltage range, VCC  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 7 V
`Input voltage range, VI (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to VCC + 0.5 V
`Output voltage range, VO (see Note 1)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to VCC + 0.5 V
`Input clamp current, IIK (VI < 0 or VI > VCC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . ±20 mA
`Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±50 mA
`Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .±50 mA
`Continuous current through VCC or GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±225 mA
`Storage temperature range  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . .65°C to 150°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated  nditions for extended periods may affect device reliability.

NOTE 1: The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are  ved.

The 74AC11590 contains an 8-bit binary counter that feeds an 8-bit storage register. The storage register has arallel 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 (RCO) output 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 register and the counter have individual positive-edge-triggered clocks. If both clocks are connected gether, 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.