HD74LS122 Datasheet, PDF (4/8 Pages) Hitachi Semiconductor – Retriggerable Monostable Multivibrators(with Clear)

HD74LS122
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Symbol
min.
typ.* max.
Unit
Condition
Input voltage
Output voltage
Input current
Short-circuit output
current
V_IH
2.0
—
—
V
V_IL
—
—
0.8
V
V_OH
2.7
—
—
V
V_CC = 4.75 V, V_IH = 2 V, V_IL = 0.8 V,
I_OH = –400 µA
V_OL
—
—
—
0.4
—
0.5
V
I_OL = 4 mA
I_OL = 8 mA
V_CC = 4.75 V, V_IH = 2 V,
V_IL = 0.8 V
I_IH
—
—
20
µA V_CC = 5.25 V, V_I = 2.7 V
I_IL
—
—
–0.4
mA V_CC = 5.25 V, V_I = 0.4 V
I_I
—
—
0.1
mA V_CC = 5.25 V, V_I = 7 V
I_OS
–20
—
–100
mA V_CC = 5.25 V
Supply current**
I_CC
—
6
11
mA V_CC = 5.25 V
Input clamp voltage
V_IK
—
—
–1.5
V
V_CC = 4.75 V, I_IN = –18 mA
* V_CC = 5 V, Ta = 25°C
** With all outputs open and 4.5 V applied to all data and clear inputs, I_CC is measured after a momentary ground, then
4.5 V, is applied to clock.
Note: To measure V_OH at Q, V_OL at Q, or I_OS at Q, ground R_ext / C_ext, apply 2 V to B and clear, and pulse A from
2 V to 0 V.
Switching Characteristics
(V_CC = 5 V, Ta = 25°C)
Item
Symbol Inputs Outputs min. typ. max. Unit
Condition
t_PLH
A
t_PHL
Q
—
23
33
Q
—
32
45
Propagation delay
t_PLH
B
time
t_PHL
Q
Q
—
—
23
34
44
56
ns
C_ext = 0, R_ext = 5 kΩ, C_L
= 15 pF, R_L = 2 kΩ
t_PLH
Clear
Q
—
20
27
t_PHL
Q
—
28
45
t_(out)min
Q
Output pulse width
A or B
t_(out)
Q
—
116 200
C_ext = 1000 pF,
4
4.5
5
µs R_ext = 10 kΩ,
C_L = 15 pF, R_L = 2 kΩ
Rev.2.00, Feb.18.2005, page 4 of 7