器件名称: HD74HC75
功能描述: Quad. Bistable Latches
文件大小: 47.64KB 共8页
简 介:HD74HC75
Quad. Bistable Latches
Description
This latch is ideally suited for use as temporary storage for binary information processing, input/output, and indicator units. Information present at the data (D) input is transferred to the Q output when the latch enable (LE) is high. The Q output will follow the data input as long as the enable remains high. when the enable goes low, the information that was present at the data input at the time the transition occurred is retained at thte Q output unit the enable is permitted to go high again.
Features
High Speed Operation: tpd (D to Q) = 12.5 ns typ (C L = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 A max Low Quiescent Supply Current: ICC (static) = 2 A max (Ta = 25°C)
Function Table
Inputs D L H X Latch Enable H H L Outputs Q L H Q0 Q H L Q0
HD74HC75
Pin Arrangement
Q0a 1 D0a 2 D1a 3 LEb 4 VCC 5 D0b 6 D1b 7 Q1b 8 (Top view)
16 Q0a 15 Q1a 14 Q1a 13 LEa 12 GND 11 Q0b 10 Q0b 9 Q1b
Block Diagram
Data
Q Q
Latch Enable
2
HD74HC75
DC Characteristics
Ta = 25°C Item Input voltage Symbol VIH Ta = –40 to +85°C Max — — — 0.5 1.35 1.8 — — — — — 0.1 0.1 0.1 0.33 0.33 ±1.0 20 A A I OL = 4 mA I OL = 5.2 mA Vin = VCC or GND Vin = VCC or GND, Iout = 0 A V I OH = –4 mA I OH = –5.2 mA Vin = VIH or VIL I OL = 20 A V Vin = VIH or VIL I OH = –20 A V Unit V Test Conditions
VCC (V) Min Typ Max Min 2.0 4.5 6.0 1.5 — 3.15 — 4.2 — — — — — — — — — — 0.5 1.5 3.15 4.2 —
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