74VHCT245 Ver la hoja de datos (PDF) - Toshiba
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74VHCT245 Datasheet PDF : 9 Pages
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TC74VHCT245AF/AFT/AFK
Electrical Characteristics
DC Characteristics
Characteristics
Symbol
Test Condition
High-level input
voltage
Low-level input
voltage
High-level output
voltage
Low-level output
voltage
3-state output
off-state current
Input leakage
current
Quiescent supply
current
Output leakage
current
VIH
VIL
VOH
VOL
IOZ
IIN
ICC
ICCT
IOPD
⎯
⎯
VIN
IOH = −50 μA
= VIH or
VIL
IOH = −8 mA
VIN
IOL = 50 μA
= VIH or
VIL
IOL = 8 mA
VIN = VIH or VIL
VOUT = VCC or GND
VIN = 5.5 V or GND
VIN = VCC or GND
Per input: VIN = 3.4 V
Other input: VCC or GND
VOUT = 5.5 V
Ta = 25°C
Ta =
−40 to 85°C Unit
VCC (V) Min Typ. Max Min Max
4.5 to
5.5
2.0
⎯
⎯
2.0
⎯
V
4.5 to
5.5
⎯
⎯
0.8
⎯
0.8
V
4.5
4.4 4.5
⎯
4.4
⎯
V
4.5 3.94 ⎯
⎯ 3.80 ⎯
4.5
⎯
0.0 0.1
⎯
0.1
V
4.5
⎯
⎯ 0.36 ⎯ 0.44
5.5
⎯
⎯ ±0.25 ⎯ ±2.50 μA
0 to 5.5 ⎯
5.5
⎯
5.5
⎯
0
⎯
⎯ ±0.1 ⎯ ±1.0 μA
⎯
4.0
⎯ 40.0 μA
⎯ 1.35 ⎯ 1.50 mA
⎯
0.5
⎯
5.0
μA
AC Characteristics (input: tr = tf = 3 ns)
Characteristics
Symbol
Test Condition
Ta = 25°C
Ta =
−40 to 85°C Unit
VCC (V) CL (pF) Min Typ. Max Min Max
Propagation delay
tpLH
time
tpHL
15
⎯
4.9
7.7
1.0
8.5
⎯
5.0 ± 0.5
ns
50
⎯
5.4
8.7
1.0
9.5
3-state output enable
time
tpZL
tpZH
RL = 1 kΩ
15
5.0 ± 0.5
50
⎯
9.4 13.8 1.0 15.0
ns
⎯
9.9 14.8 1.0 16.0
3-state output disable
time
tpLZ
tpHZ
RL = 1 kΩ
5.0 ± 0.5 50
⎯ 10.1 15.4 1.0 16.5 ns
Output to output skew
tosLH
tosHL
(Note 1) 5.0 ± 0.5 50
⎯
⎯
1.0
⎯
1.0
ns
Input capacitance
CIN
DIR, G
⎯
4
10
⎯
10
pF
Bus input capacitance
CI/O
An, Bn
⎯
13
⎯
⎯
⎯
pF
Power dissipation
capacitance
CPD
(Note 2) ⎯
16
⎯
⎯
⎯
pF
Note 1: Parameter guaranteed by design.
tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|
Note 2: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
ICC (opr) = CPD·VCC·fIN + ICC/8 (per bit)
4
2007-10-01
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