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參數(shù)資料
| 型號： | 74LS670 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 4-BY-4 REGISTER FILES WITH 3-STATE OUTPUTS |
| 中文描述： | 4 × 4 3寄存器文件態(tài)輸出 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 65K |
| 代理商： | 74LS670 |
www.fairchildsemi.com
4
DM74LS670
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 8: All typicals are at VCC = 5V, TA = 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: ICC 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 VCC = 5V and TA = 25°C
Note 11: CL = 5 pF.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 8)
VI
Input Clamp Voltage
VCC = Min, II = 18 mA
1.5
V
VOH
HIGH Level
VCC = Min, IOH = Max
2.4
3.4
V
Output Voltage
VIL = Max, VIH = Min
VOL
LOW Level
VCC = Min, IOL = Max
0.34
0.5
V
Output Voltage
IOL = Max, VIH = Min
II
Input Current @ Max
VCC = Max
D, R or W
0.1
Input Voltage
VI = 7V
GW
0.2
mA
GR
0.3
IIH
HIGH Level
VCC = Max
D, R or W
20
Input Current
VI = 2.7V
GW
40
A
GR
60
IIL
LOW Level
VCC = Max
D, R or W
0.4
Input Current
VI = 0.4V
GW
0.8
mA
GR
1.2
IOZH
Off-State Output Current with
VCC = Max, VO = 2.7V
20
A
HIGH Level Output Voltage Applied VIH = Min, VIL = Max
IOZL
Off-State Output Current with
VCC = Max, VO = 0.4V
20
A
LOW Level Output Voltage Applied VIH = Min, VIL = Max
IOS
Short Circuit Output Current
VCC = Max (Note 9)
20
100
mA
ICC
Supply Current
VCC = Max (Note 10)
30
50
mA
RL = 667
Symbol
Parameter
From (Input)
CL = 45 pF
CL = 150 pF
Units
To (Output)
Min
Max
Min
Max
tPLH
Propagation Delay Time
Read Select to Q
40
50
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Read Select to Q
45
55
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Write Enable to Q
45
55
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Write Enable to Q
50
60
ns
HIGH-to-LOW Level Output
tPLH
Propagation Delay Time
Data to Q
45
55
ns
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time
Data to Q
40
50
ns
HIGH-to-LOW Level Output
tPZH
Output Enable Time
Read Enable to Any Q
35
45
ns
to HIGH Level Output
tPZL
Output Enable Time
Read Enable to Any Q
40
50
ns
to LOW Level Output
tPHZ
Output Disable Time from
Read Enable to Any Q
50
ns
HIGH Level Output (Note 11)
tPLZ
Output Disable Time from
Read Enable to Any Q
35
ns
LOW Level Output (Note 11)
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