74LVC4245A Ver la hoja de datos (PDF) - Philips Electronics
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74LVC4245A Datasheet PDF : 16 Pages
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Philips Semiconductors
Octal dual supply translating transceiver; 3-state
Product specification
74LVC4245A
AC CHARACTERISTICS
GND = 0 V; tr = tf ≤ 2.5 ns; CL = 50 pF; Tamb = −40 to 85 °C.
LIMITS
SYMBOL
PARAMETER
tPHL/tPLH
tPZH/tPZL
tPHZ/tPLZ
propagation delay
An to Bn
propagation delay
Bn to An
3-state output enable
time OE to An
3-state output enable
time OE to Bn
3-state output disable
time OE to An
3-state output disable
time OE to Bn
WAVEFORMS
see Figs 4 and 7
VCCA = 5 V ± 0.5 V
VCCB = 3.3 V ± 0.3 V
VCCB = 2.7 V
UNIT
MIN. TYP.(1) MAX. MIN. TYP.(2) MAX.
1.5 4.0 6.5
1.5 4.5 7.0 ns
see Figs 4 and 7 1.5 4.0 6.5
1.5 4.5 7.0 ns
see Figs 6 and 7 1.5 6.2 10
1.5 7.0 11.0 ns
see Figs 6 and 7 1.5 5.0 8.1
1.5 5.7 8.7 ns
see Figs 6 and 7 1.5 5.3 7.5
1.5 5.7 8.0 ns
see Figs 6 and 7 1.5 5.8 7.8
1.5 6.2 8.5 ns
Notes
1. Typical values are measured at VCCA = 5.0 V and VCCB = 3.3 V and Tamb = 25 °C.
2. Typical values are measured at VCCA = 5.0 V and Tamb = 25 °C.
AC WAVEFORMS
handbook, halfpage VI
An, Bn
INPUT
GND
VOH
Bn, An
OUTPUT
VOL
tPHL
VM
VM
tPLH
MNA366
VM = 1.5 V at 2.7 V ≤ VCCB ≤ 3.6 V;
VM = 0.5VCCA at VCCA ≥ 4.5 V;
VOL and VOH are typical output voltage drop that occur
with the output load.
Fig.4 The input (An, Bn) to output (Bn, An)
propagation delays.
haVnCdbCoBok3, .h9alfpaVgCeCA ≥ VCCB
(V) 3.6
3.3
MNA454
3.0
2.7
2.4
2.1
1.8
1.5
1.2
0.9
1.5 2.1 2.7
Full operation
3.3 3.9 4.5 5.1 5.7
VCCA (V)
Complies with TTL levels
Fig.5 Supply operation area.
1999 Jun 15
7
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