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LMX2531LQ1500E データシート(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部品番号 LMX2531LQ1500E
部品情報  High Performance Frequency Synthesizer System with Integrated VCO
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メーカー  NSC [National Semiconductor (TI)]
ホームページ  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMX2531LQ1500E データシート(HTML) 3 Page - National Semiconductor (TI)

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Connection Diagram
20195002
Pin Descriptions
Pin #
Pin Name
I/O
Description
1
VccDIG
-
Power Supply for digital LDO circuitry. Input may range from 2.8 - 3.2 V. Bypass capacitors should be
placed as close as possible to this pin and ground.
3
GND
-
Ground
2,4,5,7,
12,
13,
29, 35
NC
-
No Connect.
6
VregBUF
-
Internally regulated voltage for the VCO buffer circuitry. Connect to ground with a capacitor.
8DATA
I
MICROWIRE serial data input. High impedance CMOS input. This pin must not exceed 2.75V. Data is
clocked in MSB first. The last bits clocked in form the control or register select bits.
9
CLK
I
MICROWIRE clock input. High impedance CMOS input. This pin must not exceed 2.75V. Data is
clocked into the shift register on the rising edge.
10
LE
I
MICROWIRE Latch Enable input. High impedance CMOS input. This pin must not exceed 2.75V. Data
stored in the shift register is loaded into the selected latch register when LE goes HIGH.
11
CE
I
Chip Enable Input. High impedance CMOS input. This pin must not exceed 2.75V. When CE is
brought high the LMX2531LQ1500E is powered up corresponding to the internal power control bits. It
is necessary to reprogram the R0 register to get the part to re-lock.
14, 15
NC
-
No Connect. Do NOT ground.
16
VccVCO
-
Power Supply for VCO regulator circuitry. Input may range from 2.8 - 3.2 V. Bypass capacitors should
be placed as close as possible to this pin and ground.
17
VregVCO
-
Internally regulated voltage for VCO circuitry. Not intended to drive an external load. Connect to
ground with a capacitor and some series resistance.
18
VrefVCO
-
Internal reference voltage for VCO LDO. Not intended to drive an external load. Connect to ground
with a capacitor.
www.national.com
3


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