MC145220DT Просмотр технического описания (PDF) - Freescale Semiconductor
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MC145220DT Datasheet PDF : 27 Pages
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MOTOROLA
Freescale Semiconductor, Inc.
SEMICONDUCTOR TECHNICAL DATA
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by MC145220/D
Dual 1.1 GHz PLL Frequency
Synthesizer
BiCMOS
The MC145220 is a low–voltage, single–chip frequency synthesizer with
serial interface capable of direct usage up to 1.1 GHz. The device simulta-
neously supports two loops. The two on–chip dual–modulus prescalers may be
independently programmed to divide by either 32/33 or 64/65.
The device consists of two dual–modulus prescalers, two 6–stage A
counters, two 12–stage N counters, two fully programmable 13–stage R
(reference) counters, and two lock detectors. Four phase/frequency detectors
are included: two with current source/sink outputs and two with double–ended
outputs.
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™ registers, the MC145220 may be cascaded
with other peripherals featuring BitGrabber Plus without requiring leading
dummy bits or multiple address bits in the serial data stream. In addition,
BitGrabber Plus peripherals may be cascaded with existing BitGrabber™
peripherals. Because this device is a dual synthesizer, a single steering bit is
used in the serial data stream to direct the data to either side of the chip.
The phase/frequency detectors have linear transfer functions (no dead
zones). The current delivered by the current source/sink outputs is controllable
via the serial port.
Also featured are low–power standby for either one or both loops and
on–board support of an external crystal. In addition, the part may be configured
such that the REFin pin accepts an external reference signal. In this
configuration, the REFout pin may be programmed to output the REFin
frequency divided by 1, 2, 4, 8, or 16.
• Operating Frequency: 40 to 1100 MHz
• Operating Supply Voltage Range: 2.7 to 5.5 V
• Supply Current: Both PLLs Operating — 12 mA Nominal
One PLL Operating, One on Standby — 6.5 mA Nominal
Both PLLs on Standby — 30 µA Maximum
• Phase Detector Output Current: Up to 2 mA @ 5 V
Up to 1 mA @ 3 V
• Operating Temperature Range: – 40 to 85°C
• Independent R Counters Allow Use of Different Step Sizes for Each Loop
• Double–Buffered R Register — Reference and Loop Divide Ratios
Updated Simultaneously
• R Counter Division Range: 1 and 10 to 8,191
• Dual–Modulus Capability Provides Total Division of the VCO Frequency up
to 262,143
• Direct Interface to Motorola SPI Data Port
• Evaluation Kit Available (Part Number MC145220EVK)
• See Application Note AN1253/D for Low–Pass Filter Design, and
AN1277/D for Offset Reference PLLs for Fine Resolution or Fast Hopping
BitGrabber and BitGrabber Plus are trademarks of Motorola, Inc.
MC145220
F SUFFIX
SOG PACKAGE
20
CASE 803C
1
20
1
DT SUFFIX
TSSOP
CASE 948D
ORDERING INFORMATION
MC145220F SOG Package
MC145220DT TSSOP
PIN ASSIGNMENT
REFin 1
REFout 2
LD 3
PDout /φR 4
Rx /φV 5
GND 6
fin 7
fin 8
V+ 9
OUTPUT A 10
20 Din
19 CLK
18 LD′
17 PDout′ /φR′
16 Rx′ /φV′
15 GND′
14 fin′
13 fin′
12 V+′
11 ENB
REV 4
1/98 TN98012300
©MSMOOotLoTrUoOlaTR, IInOOc.NL19AS98WDEIRVEICLEESDSATSAEMICFOorNMDUoCreTOInRformation On This Product,
Go to: www.freescale.com
MC145220
1
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