74HC243DB View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

MFG CO.

74HC243DB

Quad bus transceiver; 3-state

NXP Semiconductors. 

Philips Semiconductors

74HC243

Quad bus transceiver; 3-state

OEB input

output

LOW to OFF

OFF to LOW

output

HIGH to OFF

OFF to HIGH

tr

90 %

VM

10 %

tPLZ

tf

tPZL

tPHZ

10 %

90 %

VM

tPZH

VM

outputs

enabled

outputs

disabled

outputs

enabled

001aab956

VM = 0.5 × VI.

Fig 7. Waveforms showing the 3-state enable and disable times for input OEB

VI

PULSE

GENERATOR

VCC

VO

D.U.T.

RT

S1

RL =

1000 Ω

CL

mna232

VCC

open

GND

Test data is given in Table 9.

Definitions for test circuit:

RL = Load resistor.

CL = Load capacitance including jig and probe capacitance.

RT = Termination resistance should be equal to the output impedance Zo of the pulse

generator.

Fig 8. Load circuitry for switching times

Table 9:

Supply

VCC

2.0 V

4.5 V

6.0 V

5.0 V

Test data

Input

VI

VCC

VCC

VCC

VCC

tr = tf

6 ns

6 ns

6 ns

6 ns

Load

CL

50 pF

50 pF

50 pF

15 pF

RL

1 kΩ

1 kΩ

1 kΩ

1 kΩ

S1

tPZL, tPLZ

VCC

VCC

VCC

VCC

tPZH, tPHZ

GND

GND

GND

GND

tPHL, tPLH

open

open

open

open

9397 750 13808

Product data sheet

Rev. 03 — 12 November 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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