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© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

Product data sheet

Rev. 03 — 31 January 2005

13 of 22

Philips Semiconductors

74HC245; 74HCT245

Octal bus tranceiver; 3-state

12. Waveforms

Measurement points are given in Table 11.

Fig 5.

Input (An, Bn) to output (Bn, An) propagation delays and output transition times

Measurement points are given in Table 11.

Fig 6.

3-state output enable and disable times

Table 11:

Measurement points

Type

Input

Output

74HC245

74HCT245

1.3 V

1.3 V

001aac433

VM

90 %

10 %

Bn, An output

An, Bn input

GND

001aac479

outputs

disabled

outputs

enabled

90 %

10 %

outputs

enabled

OE input

GND

GND

output

LOW-to-OFF

OFF-to-LOW

output

HIGH-to-OFF

OFF-to-HIGH

90 %

10 %