9397 750 14502 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 03 — 31 January 2005 2 of 22
Philips Semiconductors
74HC245; 74HCT245
Octal bus tranceiver; 3-state
[1] C
PD
is used to determine the dynamic power dissipation (P
D
in µW):
P
D
=C
PD
× V
CC
2
× f
i
× N+∑ (C
L
× V
CC
2
× f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in V;
N = number of inputs switching;
∑ (C
L
× V
CC
2
× f
o
) = sum of outputs.
4. Ordering information
C
I
input capacitance - 3.5 - pF
C
I/O
input/output capacitance - 10 - pF
C
PD
power dissipation
capacitance per
transceiver
V
I
= GND to
V
CC
− 1.5 V
[1]
-30-pF
Table 1: Quick reference data
…continued
GND = 0 V; T
amb
=25
°
C; t
r
=t
f
= 6 ns.
Symbol Parameter Conditions Min Typ Max Unit
Table 2: Ordering information
Type number Package
Temperature range Name Description Version
74HC245N −40 °C to +125 °C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HC245D −40 °C to +125 °C SO20 plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74HC245PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
SOT360-1
74HC245DB −40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
74HC245BQ −40 °C to +125 °C DHVQFN20 plastic dual-in-line compatible thermal enhanced
very thin quad flat package no leads; 20 terminals;
body 2.5 × 4.5 × 0.85 mm
SOT764-1
74HCT245N −40 °C to +125 °C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HCT245D −40 °C to +125 °C SO20 plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74HCT245PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
SOT360-1
74HCT245DB −40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
74HCT245BQ −40 °C to +125 °C DHVQFN20 plastic dual-in-line compatible thermal enhanced
very thin quad flat package no leads; 20 terminals;
body 2.5 × 4.5 × 0.85 mm
SOT764-1
