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MC12181D Datasheet

  • MC12181D

  • Motorola, Inc [125 - 1000 MHZ FREQUENCY SYNTHESIZER]

  • MOTOROLA   MOTOROLA

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Order this document by MC12181/D
125-1000 MHz
Frequency Synthesizer
The MC12181 is a monolithic bipolar synthesizer integrating a high
performance prescaler, programmable divider, phase/frequency detector,
charge pump, and reference oscillator/buffer functions. The device is
capable of synthesizing a signal which is 25 to 40 times the input reference
signal. The device has a 4鈥揵it parallel interface to set the proper total
multiplication which can range from 25 to 40. When combined with an
external passive loop filter and VCO, the MC12181 serves as a complete
PLL subsystem.
MC12181
125 鈥?1000 MHZ
FREQUENCY SYNTHESIZER
SEMICONDUCTOR
TECHNICAL DATA
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
2.7 to 5.5 V Operation
Low power supply current of 4.25 mA typical
On chip reference oscillator/buffer supporting wide frequency operating
range from 5 to 25 MHz
4鈥揵it parallel interface for programming divider (N = 25 .... 40)
Wide 125 鈥?1000 MHz frequency of operation
Digital phase/frequency detector with linear transfer function
Balanced Charge Pump Output
Space efficient 16 lead SOIC package
Operating Temperature Range of 鈥?0 to 85擄C
> 1000 V ESD Protection (I/O to Ground, I/O to VCC)
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO鈥?6)
16
1
The device is suitable for applications where a fixed local oscillator (LO)
needs to be synthesized or where a limited number of LO frequencies need
to be generated. The device also has auxiliary open emitter outputs (Pout
and Rout) for observing the inputs to the phase detector for verification
purposes. In normal use the pins should be left open. The Reset input is
normally LOW. When this input is placed in the HIGH state the reference
prescaler is reset and the charge pump output (Do) is placed in the OFF
state.
The 4鈥揵it programming interface maps into divider states ranging from 25
to 40. A is the LSB and D is the MSB. The data inputs (A,B,C, and D) are
CMOS compatible and have pull鈥搖p resistors. The inputs can be tied directly
to Vcc or Ground for programming or can be interfaced to an external data
latch/register. Table 1 below has a mapping of the programming states.
Table 1. Programming States
D
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
C
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
B
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
A
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
Divider
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
PIN CONNECTIONS
OSCin 1
OSCout 2
VP 3
VCC 4
Do 5
GND 6
Fin 7
Fin 8
(Top View)
16 A
15 B
14 C
13 D
12 Pout
11 Reset
10 Rout
9 GND
ORDERING INFORMATION
Device
MC12181D
Operating
Temperature Range
TA = 鈥?0擄 to +85擄C
Package
SO鈥?6
漏
Motorola, Inc. 1997
Rev 2

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