WF5027 datasheet(14/21 Pages) NPC

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WF5027 series

SEIKO NPC CORPORATION —14

MEASUREMENT CIRCUITS

Measurement cct 1

Measurement parameter: IDD, IST, Duty, tr , tf

Note: The AC characteristics are observed using an oscilloscope on

pin Q.

Measurement cct 2

Measurement parameter: tOD

XTN input signal: 1Vp-p, sine wave

C1: 0.001

µFCL: 15pF

R1: 50

Ω

RL: 1kΩ

Measurement cct 3

Measurement parameter: VOH, VOL

XTN input signal: 1Vp-p, sine wave

VDD

VSS

X'tal

XTN

INHN

IDD

IST

(Including probe

capacitance)

CL = 15pF

IDD: Open

IST: Short

0.1

µF

IDD: Open

VDD

VSS

XTN

INHN

Signal

Generator

VDD

VSS

0.1

µF

VDD

VSS

XTN

Signal

Generator

Ω

0.001

µF

VOH

VOL

Ω

0.1

µFVS

∆V

VOH

∆V

VOL

0.1

µF

VS adjusted such that ∆V =

× IOH.

VS adjusted such that ∆V =

× IOL.

Measurement cct 4

Measurement parameter: VIH, VIL

VIH: Voltage in VSS to VDD transition that changes the output state.

VIL: Voltage in VDD to VSS transition that changes the output state.

INHN has an oscillation stop function.

Measurement cct 5

Measurement parameter: IZ

Measurement cct 6

Measurement parameter: RUP1, RUP2

VDD

VSS

X'tal

XTN

INHN

VIH

VIL

0.1

µF

VDD

VSS

INHN

VDD

VSS

0.1

µF

VDD

VSS

INHN

VIN

A IUP

VDD

IUP

(VIN = 0V)

RUP2 =

IUP

VDD 0.7VDD

RUP1 =

(VIN = 0.7VDD)

0.1

µF

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