100352 데이터 시트보기 (PDF) - Fairchild Semiconductor

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100352

Low Power 8-Bit Buffer with Cut-Off Drivers

Fairchild Semiconductor 

Test Circuitry

Notes:

VCC, VCCA = +2V, VEE = −2.5V

L1 and L2 = equal length 50Ω impedance lines

RT = 50Ω terminator internal to scope

Decoupling 0.1 µF from GND to VCC and VEE

All unused outputs are loaded with 25Ω to GND

CL = Fixture and stray capacitance ≤ 3 pF

FIGURE 1. AC Test Circuit

Switching Waveforms

Note:

The output AC measurement point for cut-off propagation delay

testing = the 50% voltage point between active VOL and VOH.

FIGURE 2. Propagation Delay, Cut-Off and Transition Times

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