ML12038 [LANSDALE]
1.1 GHz Low Power Dual Modulus Prescaler; 1.1 GHz的低功耗双模预分频器
| 型号： | ML12038 |
| 厂家： | 
LANSDALE SEMICONDUCTOR INC. |
| 描述： | 1.1 GHz Low Power Dual Modulus Prescaler |
| 文件： | 总5页 (文件大小：617K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ML12038
1.1 GHz Low Power
Dual Modulus Prescaler
Legacy Device: Motorola MC12038A
The ML12038 can be used with CMOS synthesizers requiring
positive edges to trigger internal counters such as Lansdale’s
ML145xxx series in a PLL to provide tuning signals up to 1.1 GHz
in programmable frequency steps.
A Divide Ratio Control (SW) permits selection of a 127/128 or
255/256 divide ratio as desired.
The Modulus Control (MC) selects the proper divide number
after SW has been biased to select the desired divide ratio.
• 1.1 GHz Toggle Frequency
• Supply Voltage 4.5 to 5.5 V
• Low Power 4.8 mA Typical
ML12038AP
ML12038AD
ML12038PP
ML12038-5P
• Operating Temperature Range T = –40° to +85°C
A
• Short Set Up Time (t ) 16ns Maximum @ 1.1 GHz
set
• Modulus Control Input Level is Compatible With Standard
Note: Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
number prefix change from ML to MLE.
CMOS and TTL
• On–Chip Output Termination
127
128
255
256
Criteria
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ML12038
LANSDALE Semiconductor, Inc.
0.1
1.4
4.8
1.1
6.5
at 5.0 Vdc
8.0
11
16
1100
100–250 MHz
(min)
400
1500
500 mv
(÷128, 1.1 Ghz Input Frequency, V = 5.0 V, T = 25°C output Loaded)
A
CC
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ML12038
LANSDALE Semiconductor, Inc.
Figure 4. AC Test Circuit
VCC 4.5 TO 5.5 Vdc
C3
Sine Wave Generator
VCC
SW
C1
C2
IN
IN
50Ω
OUT
GND
CL
EXTERNAL COMPONENTS
C1 = C2 = 1000 pF
C3 = 0.1 µF
MC
C = 8.0 pF (Including Scope
L
and jig capacitance)
MC Input
Figure 5. Input Signal Amplitude versus Input Frequency
+15.0
+1250
+710
+400
+225
+125
+71.0
+40.0
+22.5
+12.8
+7.1
+10.0
+5.0
0
-5.0
-10.0
-15.0
-20.0
-25.0
-30.0
-35.0
-40.0
-45.0
-50.0
+4.0
+2.25
+1.25
+0.71
0
250
500
750
1000
1250
1500
FREQUENCY (MHz)
Divide Ratio = 128; V
= 5.0 V; T = 25°C
A
CC
Figure 6. Output Amplitude versus Input Frequency
5000
4000
3000
2000
1000
0
0
250
500
750
1000
1250
1500
FREQUENCY (MHz)
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ML12038
LANSDALE Semiconductor, Inc.
Figure 7. Typical Input Impedance versus Input Frequency
200
150
100
50
R
MHz
0
-50
-100
-150
-200
-250
-300
-350
-400
-450
-500
-550
-600
-650
jX
100
200
300
400
500
600
700
800
900
1000 1100 1200
Frequency (MHz)
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ML12038
LANSDALE Semiconductor, Inc.
(ML12038-5P)
°
θ
θ
P DIP 8 = PP
PLASTIC PACKAGE
(ML12038PP)
CASE 626-04
Lansdale Semiconductor reserves the right to make changes without further notice to any products herein to improve reliabili-
ty, function or design. Lansdale does not assume any liability arising out of the application or use of any product or circuit
described herein; neither does it convey any license under its patent rights nor the rights of others. “Typical” parameters which
may be provided in Lansdale data sheets and/or specifications can vary in different applications, and actual performance may
vary over time. All operating parameters, including “Typicals” must be validated for each customer application by the customer’s
technical experts. Lansdale Semiconductor is a registered trademark of Lansdale Semiconductor, Inc.
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