- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370132 > 74LS (ON SEMICONDUCTOR) SYNCHRONOUS 4-BIT UP/DOWN COUNTER PDF資料下載
參數(shù)資料
| 型號(hào)： | 74LS |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 通用總線功能 |
| 英文描述： | SYNCHRONOUS 4-BIT UP/DOWN COUNTER |
| 中文描述： | 同步4位加/減計(jì)數(shù)器 |
| 文件頁(yè)數(shù)： | 3/4頁(yè) |
| 文件大?。?/td> | 88K |
| 代理商： | 74LS |
5-3
FAST AND LS TTL DATA
SN54/74LS669
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, VIN
,OH
or VIL per Truth Table
74
2.7
3.5
V
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
Others
20
μ
A
VCC= MAX VIN= 2 7 V
VCC = MAX, VIN = 2.7 V
Enable T
40
μ
A
Others
0.1
mA
VCC= MAX VIN= 7 0 V
VCC = MAX, VIN = 7.0 V
Enable T
0.2
mA
IIL
Input LOW Current
Others
–0.4
mA
VCC= MAX VIN= 0 4 V
VCC = MAX, VIN = 0.4 V
Enable T
–0.8
mA
IOS
ICC
Short Circuit Current (Note 1)
–20
–100
mA
VCC = MAX
VCC = MAX
Power Supply Current
34
mA
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
(TA = 25
°
C, VCC = 5.0 V)
Symbol
b l
Parameter
Limits
U i
Unit
Test Conditions
di i
Min
Typ
Max
fMAX
Maximum Clock Frequency
25
32
MHz
CL = 15 pF
15 F
15 F
tPLH
tPHL
Propagation Delay,
Clock to RCO
26
40
40
60
ns
tPLH
tPHL
Propagation Delay,
Clock to Any Q
18
18
27
27
ns
tPLH
tPHL
Enable to RCO
11
29
17
45
ns
tPLH
tPHL
U/D to RCO
22
26
35
40
ns
AC SETUP REQUIREMENTS
(TA = 25
°
C)
Symbol
b l
Parameter
Limits
U i
Unit
Test Conditions
di i
Min
Typ
Max
tW
ts
ts
ts
Clock Pulse Width
20
ns
VCC= 5 0 V
VCC = 5.0 V
5 0 V
5 0 V
Data Setup Time
20
ns
Enable Setup Time
35
ns
Load Setup Time
25
ns
ts
th
U/D Setup Time
30
ns
Hold Time, Any Input
0
ns
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 74LS | Decade and Binary Counters |
| 74LVT16652 | 3.3V ABT 16-Bit Transceiver/Register with TRI-STATE Outputs |
| 74LVT16652MEA | 3.3V ABT 16-Bit Transceiver/Register with TRI-STATE Outputs |
| 74LVT16652MEAX | 3.3V ABT 16-Bit Transceiver/Register with TRI-STATE Outputs |
| 74LVT16652MTD | 3.3V ABT 16-Bit Transceiver/Register with TRI-STATE Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74LS SERIES KIT | 制造商:JAMECO VALUEPRO 功能描述:420 PIECE 74LS LOGIC SERIES COMPONENT KIT |
| 74LS00 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| 74LS00 WAF | 制造商:Texas Instruments 功能描述: |
| 74LS00DC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:QUAD 2-INPUT NAND GATE |
| 74LS00FC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:QUAD 2-INPUT NAND GATE |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。