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MC145193

1.1 GHz PLL Frequency

Synthesizer

The MC145193 is recommended for new designs and offers reduced

power consumption. The counters are programmed via a synchronous serial

port which is SPI compatible. The serial port is byte-oriented to facilitate

control via an MCU. Due to the innovative BitGrabber Plus鈩?registers, the

MC145193 may be cascaded with other peripherals featuring BitGrabber

Plus without requiring leading dummy bits or address bits in the serial data

stream. In addition, BitGrabber Plus peripherals may be cascaded with

existing BitGrabber鈩?peripherals.

The device features a single鈥揺nded current source/sink phase detector A

output and a double鈥揺nded phase detector B output. Both phase detectors

have linear transfer functions (no dead zones). The maximum current of the

single鈥揺nded phase detector output is determined by an external resistor

tied from the Rx pin to ground. This current can be varied via the serial port.

Slew鈥搑ate control is provided by a special driver designed for the REFout

pin. This minimizes interference caused by REFout.

This part includes a differential RF input that may be operated in a

single鈥揺nded mode. Also featured are on鈥揵oard support of an external

crystal and a programmable reference output. The R, A, and N counters are

fully programmable. The C register (configuration register) allows the part to

be configured to meet various applications. A patented feature allows the C

register to shut off unused outputs, thereby minimizing system noise and

interference.

In order to have consistent lock times and prevent erroneous data from

being loaded into the counters, on鈥揵oard circuitry synchronizes the update

of the A register if the A or N counters are loading. Similarly, an update of the

R register is synchronized if the R counter is loading.

The double鈥揵uffered R register allows new divide ratios to be presented

to the three counters (R, A, and N) simultaneously.

PLL FREQUENCY

SYNTHESIZER

SEMICONDUCTOR

TECHNICAL DATA

20

1

F SUFFIX

PLASTIC PACKAGE

CASE 751J

(SO鈥?0)

PIN CONNECTIONS

REFout

LD

蠁

R

蠁

V

VPD

PDout

Gnd

Rx

Test 1

1

2

3

4

5

6

7

8

9

20 REFin

19 Din

18 CLK

17 ENB

16 Output A

15 Output B

14 VDD

13 Test 2

12 VCC

11 fin

(Top View)

鈥?/div>

Maximum Operating Frequency: 1100 MHz @ 鈥?10 dBm

Operating Supply Current: 3 mA Nominal at 3.0 V

Operating Supply Voltage Range (VDD, VCC, VPD Pins): 2.7 to 5.5 V

Current Source/Sink Phase Detector Output:

1.7 mA @ 5.0 V or 1.0 mA @ 3.0 V

Gain of Current Source/Sink Phase/Frequency Detector Controllable via

Serial Port

R Counter Division Range: 1 and 5 to 8191

Dual鈥揗odulus Capability Provides Total Division up to 262,143

High鈥揝peed Serial Interface: 4 Mbps

Output A Pin, When Configured as Data Out, Permits Cascading of

Devices

Two General鈥揚urpose Digital Outputs:

Output A: Totem鈥揚ole (Push鈥揚ull) with Four Output Modes

Output B: Open鈥揇rain

Patented Power鈥揝aving Standby Feature with Orderly Recovery for

Minimizing Lock Times, Standby Current: 30

碌A

See App Note AN1253/D for Low鈥揚ass Filter Design, and AN1277/D for

Offset Reference PLLs for Fine Resolution or Fast Hopping

fin 10

EVALUATION KIT

The MC145193EVK, which contains

hardware and software, is available.

ORDERING INFORMATION

Device

MC145193F

Operating

Temperature Range

TA = 鈥?0 to 85掳C

Package

SO鈥?0

BitGrabber and BitGrabber Plus are trademarks of Motorola, Inc.

漏

Motorola, Inc. 2000

Rev 1

MOTOROLA WIRELESS SEMICONDUCTOR

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