HD74HCT640 Datasheet, PDF (5/7 Pages) Hitachi Semiconductor – Octal Bus Transceivers (with 3-state outputs)

HD74HCT640/HD74HCT643
DC Characteristics
Ta = 25°C
Ta = –40 to
+85°C
Test Conditions
Item
Input voltage
Symbol Min Typ Max Min
V_IH
2.0 — — 2.0
Max
—
Unit
V
V_CC (V)
4.5 to
5.5
V_IL
— — 0.8 — 0.8 V 4.5 to
5.5
Output voltage
V_OH
V_OL
Off-state output I_OZ
current
Input current
Iin
Quiescent current I_CC
4.4 — — 4.4 — V 4.5
4.18 — — 4.13 —
4.5
— — 0.1 — 0.1 V 4.5
— — 0.26 — 0.33
4.5
— — ±0.5 — ±5.0 µA 5.5
— — ±0.1 —
— — 4.0 —
±1.0 µA 5.5
40 µA 5.5
Vin = V_IH or V_IL I_OH = –20 µA
I_OH = –6 mA
Vin = V_IH or V_IL I_OL = 20 µA
I_OL = 6 mA
Vin = V_IH or V_IL,
Vout = V_CC or GND
Vin = V_CC or GND
Vin = V_CC or GND, Iout = 0 µA
AC Characteristics (C_L = 50 pF, Input t_r = t_f = 6 ns)
Item
Symbol
Propagation delay t_PLH
time
t _PHL
Output enable
t _ZH
time
t _ZL
Output disable
t _HZ
time
t _LZ
Output rise/fall
t _TLH
time
t _THL
Input capacitance Cin
Ta = 25°C
Ta = –40 to
+85°C
Min Typ Max Min Max
— 13 18 — 23
— 16 18 — 23
— 16 46 — 58
— 16 46 — 58
— 17 43 — 54
— 21 43 — 54
— 4 12 — 15
— 5 10 — 10
Unit
ns
ns
ns
ns
pF
Test Conditions
V_CC (V)
4.5
4.5
4.5
4.5
4.5
4.5
4.5
—
5