ASM3I2187AG-08TR PULSECORE [PulseCore Semiconductor], ASM3I2187AG-08TR Datasheet

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ASM3I2187AG-08TR

Manufacturer Part Number
ASM3I2187AG-08TR
Description
Spread Spectrum Clock Generator for Mobile Applications
Manufacturer
PULSECORE [PulseCore Semiconductor]
Datasheet
June 2006
rev 0.1
Features
Block Diagram
XOUT
XIN
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018
Generates a 4X EMI optimized clock signal at the
Input frequency
Output frequency : 50MHz to 80MHz
REFOUT is same as input frequency
Selectable Centre Spread :
Low power CMOS design
3.3V ± 0.3V Operating Voltage
Available in 8-pin TSSOP
Drop-in replacement for MB88155-412 Device
Output.
± 0.5%, ± 1.0%
Available in Industrial Temperature range
(-40to 85°C)
Oscillator
Crystal
Spread Spectrum Clock Generator for Mobile Applications
: 12.5MHz to 20MHz
Notice: The information in this document is subject to change without notice.
Frequency
Feedback
Divider
Divider
PulseCore Semiconductor Corporation
www.pulsecoresemi.com
SEL
Modulation
Detector
Phase
SSON/PDB
Product Description
The ASM3P2187A/B is a versatile spread spectrum
frequency modulator designed specifically for a wide
range of clock frequencies. The ASM3P2187A/B reduces
electromagnetic interference (EMI) at the clock source,
allowing system wide reduction of EMI of
dependent
significant system cost savings by reducing the number of
circuit board layers ferrite beads,
traditionally required to pass EMI regulations.
ASM3P2187A device has an option of Spread ON/OFF
and ASM3P2187B device has Powerdown option
Applications
The ASM3P2187A/B is targeted towards mobile phones,
mobile audio players and PDAs.
Loop
Filter
signals.
VDD
VSS
VCO
The
PLL
ASM3P2187A/B
ASM3P2187A/B
Output
Divider
shielding that are
ModOUT
REFOUT
all clock
allows

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ASM3I2187AG-08TR Summary of contents

Page 1

June 2006 rev 0.1 Spread Spectrum Clock Generator for Mobile Applications Features • Generates a 4X EMI optimized clock signal at the Output. • Input frequency : 12.5MHz to 20MHz • Output frequency : 50MHz to 80MHz • REFOUT is ...

Page 2

June 2006 rev 0.1 Pin Configurations Pin Description Pin# Pin Name Type 1 XIN I 2 XOUT O 3 SSON / PDB SEL I 5 REFOUT O 6 VSS P 7 ModOUT O 8 VDD P * SSON ...

Page 3

June 2006 rev 0.1 Modulation Enable Setting Table SSON L H Power down Status Table PDB L Power Down Status H Operating Status Spread Range Selection Table SEL Spreading Range L H Absolute Maximum Ratings Symbol VDD Supply Voltage pin ...

Page 4

June 2006 rev 0.1 DC Electrical Characteristics ( Test condition: All parameters are measured at -40°C to +85°C, 3.3V ± 0.3V , VSS =0V , unless otherwise stated) Symbol Parameter V Input low voltage IL V Input high voltage IH ...

Page 5

June 2006 rev 0.1 (t OUT PUT CLOCK DUTY CYCLE D, ModOUT, REFOUT (f = 1/t ) INPUT FREQUENCY IN IN XIN ( CYCLE -- CYCLE JITTER JC ModOUT t n Note: Cycle-cycle jitter indicates the difference between ...

Page 6

June 2006 rev 0.1 Typical Crystal Oscillator Circuit Typical Crystal Specifications Fundamental AT cut parallel resonant crystal Nominal frequency Frequency tolerance Operating temperature range Storage temperature Load capacitance Shunt capacitance ESR Spread Spectrum Clock Generator for Mobile Applications Notice: The ...

Page 7

June 2006 rev 0.1 Package Information Mechanical Package Outline 8-Pin TSSOP Symbol Min A A1 0.002 A2 0.033 B 0.008 c 0.004 D 0.114 E 0.169 0.020 θ Note: Controlling dimensions are millimeters TSSOP ...

Page 8

... June 2006 rev 0.1 Ordering Codes Part Number Marking ASM3P2187AG-08TT 3P2187AG ASM3P2187AG-08TR 3P2187AG ASM3I2187AG-08TT 3I2187AG ASM3I2187AG-08TR 3I2187AG ASM3P2187BG-08TT 3P2187BG ASM3P2187BG-08TR 3P2187BG ASM3I2187BG-08TT 3I2187BG ASM3I2187BG-08TR 3I2187BG Device Ordering Information Licensed under U.S Patent Nos 5,488,627 and 5,631,921 Spread Spectrum Clock Generator for Mobile Applications Notice: The information in this document is subject to change without notice ...

Page 9

June 2006 rev 0.1 PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003 © Copyright ...

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