HD74HCT238 Datasheet, PDF (3/6 Pages) Hitachi Semiconductor – 3-to-8-line Decoder/Demultiplexer

HD74HCT238
Recommended Operating Conditions
Item
Symbol
Ratings
Supply voltage
V_CC
4.5 to 5.5
Input / Output voltage
V_IN, V_OUT
0 to V_CC
Operating temperature
Input rise / fall time^*1
Ta
–40 to 85
t_r, t_f
0 to 500
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Unit
Conditions
V
V
°C
ns
V_CC = 4.5 V
Electrical Characteristics
Item
Symbol V_CC (V)
Input voltage
V_IH 4.5 to 5.5
V_IL 4.5 to 5.5
Output voltage
V_OH
4.5
4.5
V_OL
4.5
4.5
Input current
Iin
5.5
Quiescent supply ICC
5.5
current
Ta = 25°C
Min Typ Max
2.0 — —
— — 0.8
4.4 — —
4.18 — —
— — 0.1
— — 0.26
— — ±0.1
— — 4.0
Ta = –40 to+85°C
Min Max
2.0
—
—
0.8
4.4
—
4.13
—
—
0.1
—
0.33
—
±1.0
—
40
Unit
V
V
V
V
µA
µA
Test Conditions
Vin = V_IH or V_IL I_OH = –20 µA
I_OH = –4 mA
Vin = V_IH or V_IL I_OL = 20 µA
I_OL = 4 mA
Vin = V_CC or GND
Vin = V_CC or GND, Iout = 0 µA
Switching Characteristics
Item
Symbol V_CC (V)
Propagation delay time t_PLH
4.5
t_PHL
4.5
t_PLH
4.5
t_PHL
4.5
t_PLH
4.5
t_PHL
4.5
t_PLH
4.5
t_PHL
4.5
Output rise/fall time
t_TLH
4.5
t_THL
Input capacitance
Cin
—
Ta = 25°C
Ta = –40 to +85°C
Min Typ Max Min Max
— 18 30
—
38
— 19 30
—
38
— 17 30
—
38
— 17 30
—
39
— 17 30
—
38
— 17 30
—
38
— 17 30
—
38
— 17 30
—
38
— 5 15
—
19
— 5 10
—
10
(C_L = 50 pF, Input t_r = t_f = 6 ns)
Unit
Test Conditions
ns A, B or C to Y
ns G_2A to Y
ns G_2B to Y
ns G₁ to Y
ns
pF
Rev.2.00 Mar 30, 2006 page 3 of 5