參數(shù)資料
型號： SN54LS490J
廠商： MOTOROLA INC
元件分類： 通用總線功能
英文描述： DUAL DECADE COUNTER
中文描述： LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, CDIP16
封裝： CERAMIC, DIP-16
文件頁數(shù)： 3/5頁
文件大?。?/td> 161K
代理商： SN54LS490J
5-565
FAST AND LS TTL DATA
SN54/74LS490
AC CHARACTERISTICS
(TA = 25
°
C)
Symbol
Parameter
Limits
Unit
Test Conditions
Min
Typ
Max
fMAX
tPLH
tPHL
Maximum Clock Frequency
25
35
MHz
Figure 1
CL = 15 pF
Propagation Delay, CP to Q0
12
13
20
20
ns
Figure 1
VCC = 5.0 V,
tPLH
tPHL
Propagation Delay, CP to Q1 or Q3
24
26
39
39
ns
Figure 3
tPLH
tPHL
Propagation Delay, CP to Q2
32
36
54
54
ns
Figure 2
tPHL
tPLH
tPHL
Propagation Delay, MR to Output
24
39
ns
Figure 2
Propagation Delay, MS to Output
24
20
39
36
ns
Figure 2
AC WAVEFORMS
Figure 1
Figure 2
Figure 3
*The number of Clock Pulses required between the tPHL and tPLH measurements can be determined from the Truth Table.
相關(guān)PDF資料
PDF描述
SN74LS490N 1A, 5V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125&x0176;C; Package: TO-220, SINGLE GAUGE; No of Pins: 3; Container: Rail; Qty per Container: 50
SN74LS51D 1A, 8V,±2% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: TO-220, SINGLE GAUGE; No of Pins: 3; Container: Rail; Qty per Container: 50
SN74LS51N 1A, 8V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: 3 LEAD D2PAK; No of Pins: 3; Container: Tape and Reel; Qty per Container: 800
SN74LS54D 1A, 15V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: 3 LEAD D2PAK; No of Pins: 3; Container: Tape and Reel; Qty per Container: 800
SN74LS54N 1A, 15V,±4% Tolerance, Negative Voltage Regulator, Ta = 0°C to +125°C; Package: TO-220, SINGLE GAUGE; No of Pins: 3; Container: Rail; Qty per Container: 50
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