HD74HCT244_15 Datasheet, PDF (5/9 Pages) Renesas Technology Corp – Octal Buffers/Line Drivers/Line Receivers (with inverted 3-state outputs)

HD74HCT244
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
Input voltage
Output voltage
Off-state output
current
Input current
Quiescent current
Symbol V_CC (V)
V_IH 4.5 to 5.5
V_IL 4.5 to 5.5
V_OH
4.5
4.5
V_OL
4.5
4.5
I_OZ
5.5
Iin
5.5
I_CC
5.5
Ta = 25°C
Min Typ Max
2.0 — —
— — 0.8
4.4 — —
4.18 — —
— — 0.1
— — 0.26
— — ±0.5
— — ±0.1
— — 4.0
Ta = –40 to+85°C
Min Max
2.0
—
—
0.8
4.4
—
4.13
—
—
0.1
—
0.33
—
±5.0
—
±1.0
—
40
Unit
V
V
V
V
µA
µA
µA
Test Conditions
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
Switching Characteristics
Item
Propagation delay time
Output enable time
Output disable time
Output rise/fall time
Input capacitance
Symbol V_CC (V)
t_PHL
4.5
t_PLH
4.5
t_ZL
4.5
t_ZH
4.5
t_LZ
4.5
t_HZ
4.5
t_TLH / t_THL 4.5
Cin
—
Ta = 25°C
Ta = –40 to +85°C
Min Typ Max Min Max
— 11 20
—
25
— 9 20
—
25
— 13 30
—
38
— 12 30
—
38
— 14 30
—
38
— 17 30
—
38
— 4 12
—
15
— 5 10
—
10
(C_L = 50 pF, Input t_r = t_f = 6 ns)
Unit
Test Conditions
ns
ns
ns
ns
pF
Test Circuit
VCC
VCC
Input
Pulse Generator
Zout = 50 Ω
1G, 2G
Output
1Y1 to 2Y4
1A1 to 2A4
Note : 1. C_L includes probe and jig capacitance.
1 k Ω _S1
C_L =
50 pF
OPEN
GND
V_CC
TEST
t_PLH / t _PHL
t_ZH/ t _HZ
t_ZL / t _LZ
S1
OPEN
GND
V_CC
Rev.2.00 Mar 30, 2006 page 3 of 6