HD74LS123 Datasheet, PDF (3/9 Pages) Hitachi Semiconductor – Dual Retriggerable Monostable Multivibrators(with Clear)

HD74LS123
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
V_CC
7
V
Input voltage
V_IN
7
V
Power dissipation
Storage temperature
P_T
Tstg
400
mW
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Supply voltage
Item
Output current
Operating temperature
Input pulse width
“H”
A, B
“L”
CLR “L”
External timing resistance
External capacitance
Wiring capacitance at Rext/Cext terminal
Symbol
V_CC
I_OH
I_OL
Topr
t_{w (in)}
R_ext
C_ext
Min
4.75
—
—
–20
40
40
40
5
—
Typ
Max
Unit
5.00
5.25
V
—
–400
µA
—
8
mA
25
75
°C
—
—
ns
—
—
ns
—
—
ns
—
260
kΩ
Non restriction
—
50
pF
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
—
12
20
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.
Rev.2.00, Feb.18.2005, page 3 of 8