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DM74LS670
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 8: All typicals are at V
CC
= 5V, T
A
= 25°C.
Note 9: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 10: I
CC
is measured with 4.5V applied to all DATA inputs and both ENABLE inputs, all ADDRESS inputs are grounded and all outputs are OPEN.
Switching Characteristics
at V
CC
= 5V and T
A
= 25°C
Note 11: C
L
= 5 pF.
Symbol Parameter Conditions Min
Typ
Max Units
(Note 8)
V
I
Input Clamp Voltage V
CC
= Min, I
I
= −18 mA −1.5 V
V
OH
HIGH Level V
CC
= Min, I
OH
= Max
2.4 3.4 V
Output Voltage V
IL
= Max, V
IH
= Min
V
OL
LOW Level V
CC
= Min, I
OL
= Max
0.34 0.5 V
Output Voltage I
OL
= Max, V
IH
= Min
I
I
Input Current @ Max V
CC
= Max D, R or W 0.1
Input Voltage V
I
= 7V G
W
0.2 mA
G
R
0.3
I
IH
HIGH Level V
CC
= Max D, R or W 20
Input Current V
I
= 2.7V G
W
40 µA
G
R
60
I
IL
LOW Level V
CC
= Max D, R or W −0.4
Input Current V
I
= 0.4V G
W
−0.8 mA
G
R
−1.2
I
OZH
Off-State Output Current with V
CC
= Max, V
O
= 2.7V
20 µA
HIGH Level Output Voltage Applied V
IH
= Min, V
IL
= Max
I
OZL
Off-State Output Current with V
CC
= Max, V
O
= 0.4V
−20 µA
LOW Level Output Voltage Applied V
IH
= Min, V
IL
= Max
I
OS
Short Circuit Output Current V
CC
= Max (Note 9) −20 −100 mA
I
CC
Supply Current V
CC
= Max (Note 10) 30 50 mA
R
L
= 667Ω
Symbol Parameter From (Input)
C
L
= 45 pF C
L
= 150 pF
Units
To (Output) Min Max Min Max
t
PLH
Propagation Delay Time
Read Select to Q 40 50 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Read Select to Q 45 55 ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Write Enable to Q 45 55 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Write Enable to Q 50 60 ns
HIGH-to-LOW Level Output
t
PLH
Propagation Delay Time
Data to Q 45 55 ns
LOW-to-HIGH Level Output
t
PHL
Propagation Delay Time
Data to Q 40 50 ns
HIGH-to-LOW Level Output
t
PZH
Output Enable Time
Read Enable to Any Q 35 45 ns
to HIGH Level Output
t
PZL
Output Enable Time
Read Enable to Any Q 40 50 ns
to LOW Level Output
t
PHZ
Output Disable Time from
Read Enable to Any Q 50 ns
HIGH Level Output (Note 11)
t
PLZ
Output Disable Time from
Read Enable to Any Q 35 ns
LOW Level Output (Note 11)
