MC74LCX16240(2012) Ver la hoja de datos (PDF) - ON Semiconductor

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MC74LCX16240
(Rev.:2012)

Low-Voltage CMOS 16-Bit Buffer

ON Semiconductor 

MC74LCX16240

Dn

Vmi

tPHL

On

Vmo

Vmi

tPLH

Vmo

VCC

0V

VOH

VOL

WAVEFORM 1 − PROPAGATION DELAYS

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

OEn

tPZH

On

Vmi

tPHZ

Vmo

VCC

0V

VOH

VHZ

tPZL

tPLZ

Vmo

On

VLZ

VOL

WAVEFORM 2 − OUTPUT ENABLE AND DISABLE TIMES

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

Figure 3. AC Waveforms

Table 2. AC WAVEFORMS

Symbol

Vmi

Vmo

VHZ

VLZ

3.3 V ± 0.3 V

1.5 V

1.5 V

VOL + 0.3 V

VOH − 0.3 V

VCC

2.7 V

1.5 V

1.5 V

VOL + 0.3 V

VOH − 0.3 V

2.5 V + 0.2 V

VCC / 2

VCC / 2

VOL + 0.15 V

VOH − 015 V

PULSE

GENERATOR

VCC

DUT

RT

R1

CL

RL

6 V or VCC × 2

OPEN

GND

Figure 4. Test Circuit

Table 3. TEST CIRCUIT

TEST

SWITCH

tPLH, tPHL

tPZL, tPLZ

Open

6 V at VCC = 3.3 0.3 V

6 V at VCC = 2.5 0.2 V

Open Collector/Drain tPLH and tPHL

6V

tPZH, tPHZ

GND

CL = 50 pF at VCC = 3.3 0.3 V or equivalent (includes jig and probe capacitance)

CL = 30 pF at VCC = 2.5 0.2 V or equivalent (includes jig and probe capacitance)

RL = R1 = 500 W or equivalent

RT = ZOUT of pulse generator (typically 50 W)

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