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參數(shù)資料
| 型號(hào)： | EH1445SJETTS-20.000M |
| 廠商： | ECLIPTEK CORP |
| 元件分類： | XO, clock |
| 英文描述： | CRYSTAL OSCILLATOR, CLOCK, 20 MHz, HCMOS/TTL OUTPUT |
| 封裝： | ROHS COMPLIANT, PLASTIC, J-LEADED, SMD, 4 PIN |
| 文件頁數(shù)： | 3/5頁 |
| 文件大小： | 139K |
| 代理商： | EH1445SJETTS-20.000M |
EH1445SJETTS-20.000M
OUTPUT DISABLE
(HIGH IMPEDANCE
STATE)
OUTPUT WAVEFORM & TIMING DIAGRAM
VOH
VOL
80% or 2.0VDC
50% or 1.4VDC
20% or 0.8VDC
Fall
Time
Rise
Time
TW
T
Duty Cycle (%) = TW/T x 100
VIH
VIL
tPLZ
tPZL
CLOCK
OUTPUT
TRI-ST
A
TE
INPUT
Supply
Voltage
(VDD)
Test Circuit for TTL Output
Output
No Connect
or Tri-State
Ground
+
_
Power
Supply
Voltage
Meter
Current
Meter
0.01F
(Note 1)
0.1F
(Note 1)
CL
(Note 3)
RL
(Note 4)
Power
Supply
Oscilloscope
Frequency
Counter
Probe
(Note 2)
Note 1: An external 0.1F low frequency tantalum bypass capacitor in parallel with a 0.01F high frequency
ceramic bypass capacitor close to the package ground and VDD pin is required.
Note 2: A low capacitance (<12pF), 10X attenuation factor, high impedance (>10Mohms), and high bandwidth
(>300MHz) passive probe is recommended.
Note 3: Capacitance value CL includes sum of all probe and fixture capacitance.
Note 4: Resistance value RL is shown in Table 1. See applicable specification sheet for 'Load Drive Capability'.
Note 5: All diodes are MMBD7000, MMBD914, or equivalent.
Table 1: RL Resistance Value and CL Capacitance
Value Vs. Output Load Drive Capability
Output Load
Drive Capability
RL Value
(Ohms)
CL Value
(pF)
10TTL
5TTL
2TTL
10LSTTL
1TTL
390
780
1100
2000
2200
15
6
15
3
www.ecliptek.com | Specification Subject to Change Without Notice | Rev E 3/12/2011 | Page 3 of 5
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|---|---|
| EH14B1 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:12 Amp Encapsulated Assemblies |
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