MC74LVXC3245DT Ver la hoja de datos (PDF) - Motorola => Freescale

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MC74LVXC3245DT

Configurable Dual Supply Octal Transceiver with 3−State Outputs for 3 V Systems

Motorola => Freescale 

MC74LVXC3245

An, Bn 50% VCC

tPLH

Bn, An

50% VCC

VCC

50% VCC

0V

tPHL

VOH

50% VCC

VOL

WAVEFORM 1 – PROPAGATION DELAYS

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

OE, T/R

An, Bn

An, Bn

50% VCC

50% VCC

tPZH

tPHZ

50% VCC

tPZL

tPLZ

50% VCC

WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES

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

Figure 4. AC Waveforms

VCC

0V

VCC

VOH – 0.3V

≈ 0V

≈ VCC

VOL + 0.3V

GND

PULSE

GENERATOR

VCC

DUT

RT

R1

CL

RL

2xVCC

OPEN

TEST

SWITCH

tPLH, tPHL, tPZH, tPHZ

Open

tPZL, tPLZ

2xVCC

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

RL = R1 = 500Ω or equivalent

RT = ZOUT of pulse generator (typically 50Ω)

Figure 5. Test Circuit

LVX Data — Low–Voltage CMOS Logic

7

BR1492 — Rev 0

MOTOROLA

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