M74HC670B1R屬于集成電路（IC）的移位寄存器。由意法半導體集團制造生產(chǎn)的M74HC670B1R移位寄存器移位寄存器是低級邏輯器件，通常用于在串行和并行方式之間轉(zhuǎn)換數(shù)字邏輯信號形式的數(shù)據(jù)，或在數(shù)字字內(nèi)移動數(shù)據(jù)位的位置。移位寄存器通常使用集成到一個設備中的一組觸發(fā)器來實現(xiàn)，常用于集成度更高的邏輯器件，但仍可用于 I/O 擴展等應用，在這些應用中離散形式的函數(shù)可能會非常有用。

DESCRIPTION

The M74HC670 is an high speed CMOS 4-WORD x 4 BIT REGISTER FILE (3 STATE) fabricated with silicon gate C2MOS technology.

The M74HC670 is 4 x 4 Register File organized as four words by four bits. Separate read and write inputs, both address and enable, allow simultaneous read and write operation. The 3-state outputs make it possible to connect up to 128 outputs to increase the word capacity up to 512 words. Any number of these devices can be operated in parallel to generate an n-bit length.

All inputs are equipped with protection circuits against static discharge and transient excess voltage.

■ HIGH SPEED : tPD = 22 ns (TYP.) at VCC = 6V

■ LOW POWER DISSIPATION: ICC =4μA(MAX.) at TA=25°C

■ HIGH NOISE IMMUNITY: VNIH = VNIL = 28 VCC (MIN.)

■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN)

■ BALANCED PROPAGATION DELAYS: tPLH ? tPHL

■ WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V

■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 670