MC74LVQ646DT Просмотр технического описания (PDF) - Motorola => Freescale

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MC74LVQ646DT

Low-Voltage Quiet CMOS Octal Transceiver/Registered Transceiver (3-State, Non-Inverting)

Motorola => Freescale 

VCC

An, Bn

50% VCC

0V

ts

th

VCC

CAB,

CBA

50% VCC

tw

50% VCC

0V

fmax

tPLH, tPHL

VOH

Bn, An

50% VCC

VOL

WAVEFORM 3 – CLOCK to Bn/An PROPAGATION DELAYS, CLOCK MINIMUM PULSE WIDTH,

An/Bn to CLOCK SETUP AND HOLD TIMES

tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns except when noted

NEGATIVE

PULSE

tw

50% VCC

50% VCC

MC74LVQ646

POSITIVE

PULSE

50% VCC

tw

WAVEFORM 4 – INPUT PULSE DEFINITION

tR = tF = 2.5ns, 10% to 90% of 0V to VCC

50% VCC

Figure 2. AC Waveforms

PULSE

GENERATOR

VCC

DUT

RT

R1

CL

RL

6V

OPEN

GND

LCX DATA

BR1478

TEST

SWITCH

tPLH, tPHL

Open

tPZL, tPLZ

6V

Open Collector/Drain tPLH and tPHL

6V

tPZH, tPHZ

GND

CL = 50pF or equivalent (Includes jig and probe capacitance)

RL = R1 = 500Ω or equivalent

RT = ZOUT of pulse generator (typically 50Ω)

Figure 3. Test Circuit

7

MOTOROLA

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