U74CB3Q3257

Advance

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

8 of 9

www.unisonic.com.tw

QW-R502-D36.a



TEST CIRCUIT AND WAVEFORMS

Note: CL includes probe and jig capacitance.

TEST

VCC

S1

RL

VI

CL

VΔ

tPD

2.5V±0.2V

Open

500Ω

VCC or GND

30pF

3.3V±0.3V

Open

500Ω

VCC or GND

50pF

tPLZ / tPZL

2.5V±0.2V

2×VCC

500Ω

GND

30pF

0.15V

3.3V±0.3V

2×VCC

500Ω

GND

50pF

0.3V

tPHZ / tPZH

2.5V±0.2V

GND

500Ω

VCC

30pF

0.15V

3.3V±0.3V

GND

500Ω

VCC

50pF

0.3V

Notes: 1. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by

the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the

output control.

3. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10MHz, ZO=50Ω,

tr ≤ 2.5 ns, tf ≤ 2.5 ns.

4. The outputs are measured one at a time, with one transition per measurement.

5. tPLZ and tPHZ are the same as tdis.

6. tPZL and tPZH are the same as ten.

7. tPLH and tPHL are the same as tPD(s). The tpd propagation delay is the calculated RC time constant of the

typical ON-state resistance of the switch and the specified load capacitance, when driven by an ideal

voltage source (zero output impedance).

8. All parameters and waveforms are not applicable to all devices.