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HD74HC4538P Datasheet(PDF) 4 Page - Renesas Technology Corp |
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HD74HC4538P Datasheet(HTML) 4 Page - Renesas Technology Corp |
4 / 14 page HD74HC4538 Rev.2.00 Mar 30, 2006 page 4 of 13 Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Ta = 25 °C Ta = –40 to +85 °C Item Symbol VCC (V) Min Typ Max Min Max Unit Test Conditions 2.0 — — 235 — 295 4.5 — 22 47 — 59 tPLH 6.0 — — 40 — 50 ns A or B to Q 2.0 — — 260 — 325 4.5 — 23 52 — 65 tPHL 6.0 — — 44 — 55 ns A or B to Q 2.0 — — 235 — 295 4.5 — 17 47 — 59 tPHL 6.0 — — 40 — 50 ns CD to Q 2.0 — — 235 — 295 4.5 — — 47 — 59 Propagation delay time tPLH 6.0 — — 40 — 50 ns CD to Q 2.0 80 — — 100 — 4.5 16 — — 20 — Pulse width tw 6.0 14 — — 17 — ns A, B, CD 3.0 — 150 — — — 5.0 — 100 — — — ns RX = 1 k Ω, CX = 12 pF 3.0 — — — — — 5.0 — 1.3 — — — µs RX = 10 kΩ, CX = 100 pF 3.0 — — — — — 5.0 — 9 — — — µs RX = 10 kΩ, CX = 1000 pF 3.0 — — — — — Output pulse width tWQ 5.0 — 70 — — — µs RX = 10 kΩ, CX = 10000 pF Pulse width match between circuits in the same package ∆tWQ 5.0 — ±0.1 — — — % RX = 10 k Ω, CX = 1000 pF Caution in use: In order to prevent any malfunctions due to noise, connect a high frequency performance capacitor between VCC and GND, and keep the wiring between the External components and Cext, Rext/Cext pins as short as possible. Test Circuit VCC C = 50 pF VCC L Q Rext/Cext Cext Clear Q Zout = 50 Ω Zout = 50 Ω Zout = 50 Ω C = 50 pF L Rext Cext Note : 1. CL includes probe and jig capacitance. Output Input B Pulse Generator Output Input A Pulse Generator Pulse Generator Input Clear |
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