HD74LS243 Datasheet, PDF (3/7 Pages) Hitachi Semiconductor – Quadruple Bus Transceivers(with three-state outputs)

HD74LS243
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Symbol min. typ.* max. Unit
Condition
Input voltage
Hysteresis
V_IH
2.0
V_IL
—
V_T+ – V_T–
0.2
V_OH
2.4
Output voltage
2
—
V_OL
—
Off-state output current
I_OZH
—
I_OZL
—
I_IH
—
A Input
—
—
—
V
—
0.8
V
0.4
—
V V_CC = 4.75 V
—
—
—
—
V
V_IL = 0.8 V, I_OH = – 3 mA
V_IL = 0.5 V, I_OH = – 15 mA
V_CC = 4.75 V,
V_IH = 2 V
—
0.4
V
I_OL = 12 mA
—
0.5
I_OL = 24 mA
V_CC = 4.75 V, V_IH = 2 V,
V_IL = 0.8 V
—
40
µA V_O = 2.7 V
V_CC = 5.25 V, V_IH = 2 V,
—
–200
µA V_O = 0.4 V
V_IL = 0.8 V
—
20
µA V_CC = 5.25 V, V_I = 2.7 V
—
–0.2
V_CC = 5.25 V, V_I = 0.4 V,
GAB or GBA at GND
Input
B Input
I_IL
current
GAB or GBA
A or B
GAB or GBA
I_I
Short-circuit output
current
I_OS
—
—
–0.2
mA V_CC = 5.25 V, V_I = 0.4 V,
GAB or GBA at 4.5 V
—
—
–0.2
V_CC = 5.25 V, V_I = 0.4 V
—
—
0.1
mA ^{VCC = 5.25 V, VI = 5.5 V}
—
—
0.1
V_CC = 5.25 V, V_I = 7 V
–40
—
–225 mA V_CC = 5.25 V
I_CCH
—
22
38
Supply current**
I_CCL
—
29
50
mA V_CC = 5.25 V
I_CCZ
—
32
54
Input clamp voltage
V_IK
—
—
–1.5
V V_CC = 4.75 V, I_IN = –18 mA
Notes: * V_CC = 5 V, Ta = 25°C
** With all outputs open, I_CC is measured with transceivers enabled in one direction only, or with all transceivers
disabled.
Switching Characteristics
(V_CC = 5 V, Ta = 25°C)
Item
Symbol
min.
typ.
max.
Unit
Condition
Propagation delay time
t_PLH
—
12
18
Output enable time
t_PHL
—
t_ZL
—
12
20
18
30
C_L = 45 pF, R_L = 667 Ω
ns
t_ZH
—
15
23
Output disable time
t_LZ
—
15
25
t_HZ
—
10
18
C_L = 5 pF, R_L = 667 Ω
Rev.3.00, Jul.15.2005, page 3 of 6