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74ACT161 Datasheet Synchronous Presettable 4-bit Counter

Manufacturer: STMicroelectronics

Overview: 74ACT161 SYNCHRONOUS PRESETTABLE 4-BIT COUNTER s HIGH SPEED: fMAX = 290MHz (TYP.) at VCC = 5V s LOW POWER DISSIPATION: ICC = 8µA(MAX.) at TA=25°C s COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.), VIL = 0.8V (MAX.) s 50Ω TRANSMISSION LINE DRIVING CAPABILITY s SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) s BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL s OPERATING VOLTAGE RANGE: VCC (OPR) = 4.5V to 5.

General Description

The 74ACT161 is an advanced high-speed CMOS SYNCRONOUS PRESETTABLE COUNTER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology.

It is a 4 bit binary counter with Asynchronous Clear.

The circuit have four fundamental modes of operation, in order of preference: synchronous reset, parallel load, count-up and hold.

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