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| 74HC242 Datasheet, PDF (6/7 Pages) NXP Semiconductors – Quad bus transceiver; 3-state; inverting | |||
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Philips Semiconductors
Quad bus transceiver; 3-state; inverting
Product speciï¬cation
74HC/HCT242
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see â74HC/HCT/HCU/HCMOS Logic Family Specificationsâ.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (âICC) for a unit load of 1 is given in the family specifications.
To determine âICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
An
Bn
OEA
OEB
UNIT LOAD COEFFICIENT
1.10
1.10
1.00
1.00
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
SYMBOL PARAMETER
tPHL/ tPLH
tPZH/ tPZL
tPHZ/ tPLZ
tTHL/ tTLH
propagation delay
An to Bn;
Bn to An
3-state output enable time
OEA to An or Bn;
OEB to An or Bn
3-state output disable time
OEA to An or Bn;
OEB to An or Bn
output transition time
Tamb (°C)
TEST CONDITIONS
74HCT
+25
â40 to +85
â40 to +125
UNIT
VCC
(V)
WAVEFORMS
min. typ. max. min. max. min. max.
12 20
25
30 ns 4.5 Fig.5
16 34
43
51 ns 4.5 Figs 6 and 7
22 35
44
53 ns 4.5 Figs 6 and 7
5 12
15
18 ns 4.5 Fig.5
December 1990
6
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