7LVC241APWDH Просмотр технического описания (PDF) - Philips Electronics

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7LVC241APWDH

Octal buffer/line driver with 5-volt tolerant inputs/outputs 3-Statetitle

Philips Electronics 

Philips Semiconductors

Octal buffer/line driver with 5-volt tolerant

inputs/outputs (3-State)

Product specification

74LVC241A

AC WAVEFORMS

VM = 1.5 V at VCC ≥ 2.7 V

VM = 0.5 × VCC at VCC < 2.7 V

Vx = VOL + 0.3 V at VCC ≥ 2.7 V

Vx = VOL + 0.1 V × VCC at VCC < 2.7 V

VY = VOH – 0.3 V at VCC ≥ 2.7 V

VY = VOH – 0.1 × VCC at VCC < 2.7 V

VOL and VOH are the typical output voltage drop that occur with the

output load.

VI

1An, 2An

INPUTS

VM

GND

VOH

tPHL

tPLH

1Yn, 2Yn

VM

OUTPUT

VOL

SV00617

Figure 1. Input (1An, 2An) to output (1Yn, 2Yn) propagation

delays.

VI

1OE INPUT

GND

VCC OUTPUT

LOW-to-OFF

OFF-to-LOW

VOL

VOH OUTPUT

HIGH-to-OFF

OFF-to-HIGH

GND

VM

tPLZ

tPZL

VX

tPHZ

VY

outputs

enabled

VM

tPZH

outputs

disabled

VM

outputs

enabled

SV00618

Figure 2. 3-state enable and disable times for input 1OE.

VI

2OE INPUT

VM

GND

tPLZ

tPZL

VCC OUTPUT

LOW-to-OFF

OFF-to-LOW

VOL

VX

tPHZ

VM

tPZH

VOH OUTPUT

HIGH-to-OFF

OFF-to-HIGH

GND

outputs

enabled

VY

outputs

disabled

VM

outputs

enabled

SV00619

Figure 3. 3-state enable and disable times for input 2OE.

TEST CIRCUIT

VI

PULSE

GENERATOR

VCC

D.U.T.

RT

VO

CL 50pF

S1

500Ω

2 x VCC

Open

GND

500Ω

VCC

t 2.7V

2.7V – 3.6V

VI

VCC

2.7V

Test

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

S1

Open

2 x VCC

GND

SY00003

Figure 4. Load circuitry for switching times.

1998 May 20

6

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