MC145488 Ver la hoja de datos (PDF) - Motorola => Freescale

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MC145488

Low-Voltage Cmos Octal Transceiver

Motorola => Freescale 

MC74LCX2245

CAPACITIVE CHARACTERISTICS

Symbol

Parameter

CIN

CI/O

CPD

Input Capacitance

Input/Output Capacitance

Power Dissipation Capacitance

Condition

Typical

Unit

VCC = 3.3V, VI = 0V or VCC

7

pF

VCC = 3.3V, VI = 0V or VCC

8

pF

10MHz, VCC = 3.3V, VI = 0V or VCC

25

pF

2.7V

An, Bn

1.5V

1.5V

0V

tPLH

tPHL

VOH

Bn, An

1.5V

1.5V

VOL

WAVEFORM 1 – PROPAGATION DELAYS

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

2.7V

OE, T/R

An, Bn

1.5V

1.5V

tPZH

tPHZ

1.5V

tPZL

tPLZ

0V

VCC

VOH – 0.3V

≈ 0V

≈ 3.0V

An, Bn

1.5V

WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES

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

Figure 3. AC Waveforms

VOL + 0.3V

GND

PULSE

GENERATOR

VCC

DUT

RT

R1

CL

RL

6V

OPEN

GND

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 4. Test Circuit

LCX DATA

5

BR1339 — REV 3

MOTOROLA

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