參數(shù)資料
型號(hào): 74LS77
廠商: Motorola, Inc.
英文描述: 4-BIT D LATCH LOW POWER SCHOTTKY
中文描述: 4位D鎖存低功耗肖特基
文件頁(yè)數(shù): 3/4頁(yè)
文件大?。?/td> 71K
代理商: 74LS77
5-3
FAST AND LS TTL DATA
SN54/74LS77
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Symbol
b l
Parameter
Limits
U i
Unit
Test Conditions
di i
Min
Typ
Max
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
54
0.7
V
Guaranteed Input LOW Voltage for
All Inputs
74
0.8
VIK
Input Clamp Diode Voltage
–0.65
–1.5
V
VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54
2.5
3.5
V
VCC = MIN, IOH = MAX,
,OH
or VIL per Truth Table
74
2.7
3.5
V
IN
IH
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 4.0 mA
VCC = VCC MIN,
VIN= VILor VIH
VIN = VIL or VIH
per Truth Table
74
0.35
0.5
V
IOL = 8.0 mA
IIH
Input HIGH Current
D Input
E Input
20
80
μ
A
VCC = MAX, VIN = 2.7 V
D Input
E Input
0.1
0.4
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
D Input
E Input
–0.4
–1.6
mA
VCC = MAX, VIN = 0.4 V
IOS
ICC
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
Short Circuit Current (Note 1)
–20
–100
mA
VCC = MAX
VCC = MAX
Power Supply Current
13
mA
AC CHARACTERISTICS
(TA = 25
°
C, VCC = 5.0 V)
Symbol
b l
Parameter
Limits
U i
Unit
Test Conditions
di i
Min
Typ
Max
tPLH
tPHL
Propagation Delay, Data to Q
11
9.0
19
17
ns
VCC = 5.0 V
CL = 15 pF
tPLH
tPHL
Propagation Delay, Enable to Q
10
10
18
18
ns
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