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参数资料
| 型号： | SN74LS90DR2 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 计数器 |
| 英文描述： | LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP DECADE COUNTER, PDSO14 |
| 封装： | SOIC-14 |
| 文件页数： | 6/6页 |
| 文件大小： | 80K |
| 代理商： | SN74LS90DR2 |
5-6
FAST AND LS TTL DATA
SN54/74LS90
SN54/74LS92 SN54/74LS93
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V, CL = 15 pF)
Sb l
P
Limits
Ui
Sb l
P
LS90
LS92
LS93
Ui
Symbol
Parameter
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
fMAX
CP0 Input Clock Frequency
32
MHz
fMAX
CP1 Input Clock Frequency
16
MHz
tPLH
tPHL
Propagation Delay,
CP0 Input to Q0 Output
10
12
16
18
10
12
16
18
10
12
16
18
ns
tPLH
tPHL
CP0 Input to Q3 Output
32
34
48
50
32
34
48
50
46
70
ns
tPLH
tPHL
CP1 Input to Q1 Output
10
14
16
21
10
14
16
21
10
14
16
21
ns
tPLH
tPHL
CP1 Input to Q2 Output
21
23
32
35
10
14
16
21
23
32
35
ns
tPLH
tPHL
CP1 Input to Q3 Output
21
23
32
35
21
23
32
35
34
51
ns
tPLH
MS Input to Q0 and Q3 Outputs
20
30
ns
tPHL
MS Input to Q1 and Q2 Outputs
26
40
ns
tPHL
MR Input to Any Output
26
40
26
40
26
40
ns
AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V)
Sb l
P
Limits
Ui
Sb l
P
LS90
LS92
LS93
Ui
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Unit
tW
CP0 Pulse Width
15
ns
tW
CP1 Pulse Width
30
ns
tW
MS Pulse Width
15
ns
tW
MR Pulse Width
15
ns
trec
Recovery Time MR to CP
25
ns
RECOVERY TIME (trec) is defined as the minimum time required between the end of the reset pulse and the clock transition from HIGH-to-LOW in order to recognize
and transfer HIGH data to the Q outputs
AC WAVEFORMS
Figure 1
Figure 2
Figure 3
*CP
Q
1.3 V
tPHL
tW
1.3 V
tPLH
*The number of Clock Pulses required between the tPHL and tPLH measurements can be determined from the appropriate Truth Tables.
MR & MS
CP
Q
MS
Q0 Q3
(LS90)
1.3 V
tPHL
tW
tPLH
trec
tW
CP
trec
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74LS90DRE4 | 功能描述:计数器 IC DECADE COUNTER RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
| SN74LS90DRG4 | 功能描述:计数器 IC Decade Counter RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
| SN74LS90N | 功能描述:计数器 IC DECADE COUNTER RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
| SN74LS90N | 制造商:Texas Instruments 功能描述:Counter / Multiplier / Divider Logic IC |
| SN74LS90NE4 | 功能描述:计数器 IC DECADE COUNTER RoHS:否 制造商:NXP Semiconductors 计数器类型:Binary Counters 逻辑系列:74LV 位数:10 计数法: 计数顺序: 工作电源电压:1 V to 5.5 V 工作温度范围:- 40 C to + 125 C 封装 / 箱体:SOT-109 封装:Reel |
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