HD74LS293 Datasheet, PDF (3/8 Pages) Hitachi Semiconductor – 4-bit Binary Counters

HD74LS293
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
V_CC
7
V
Input voltage
R_O Inputs
V_IN
A, B Inputs
7
V
5.5
V
Power dissipation
Operating temperature
P_T
Topr
400
mW
–20 to +75
°C
Storage temperature
Tstg
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Supply voltage
Output current
Operating temperature
Count frequency
A input
B input
A input
Pulse width
B input
Reset
inputs
Setup time
Symbol
V_CC
I_OH
I_OL
Topr
ƒ_count
t_w
t_su
Min
4.75
—
—
–20
0
0
15
30
15
25
Typ
Max
5.00
5.25
—
–400
—
8
25
75
—
32
—
16
—
—
—
—
—
—
—
—
Unit
V
µA
mA
°C
MHz
ns
ns
Electrical Characteristics
(Ta = –20 to +75 °C)
Item
Symbol min. typ.* max. Unit
Condition
Input voltage
V_IH
2.0
—
—
V
V_IL
—
—
0.8
V
Output voltage
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
V
I_OL = 4 mA** V_CC = 4.75 V,
—
—
0.5
I_OL = 8 mA** ^VIH ^{= 2 V, V}IL ^{= 0.8 V}
Any Reset
—
—
20
A input
B input
I_IH
—
—
40
µA V_CC = 5.25 V, V_I = 2.7 V
—
—
40
Any Reset
—
—
–0.4
Input
current
A input
I_IL
—
—
–2.4
mA V_CC = 5.25 V, V_I = 0.4 V
B input
—
—
–1.6
Any Reset
—
—
0.1
V_I = 7 V
A input
B input
I_I
—
—
—
—
0.2
0.2
mA
V_I = 5.5 V ^{VCC = 5.25 V}
Short-circuit output current
I_OS
–20
—
–100
mA V_CC = 5.25 V
Supply current***
I_CC
—
9
15
mA V_CC = 5.25 V
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
** Q_A output is tested at specified I_OL plus the limit value of I_IL for the B input. This permits driving the B input
while maintaining full fan-out capability.
*** I_CC is measured with all outputs open, both R₀ inputs grounded following momentary connection to 4.5 V, and
all other inputs grounded.
Rev.3.00, Jul.15.2005, page 3 of 7