Details, datasheet, quote on part number: ICS149317
PartICS149317
Category
DescriptionClock Synthesizer for Portable Systems
CompanyIntegrated Circuit System
DatasheetDownload ICS149317 datasheet
  

 

Features, Applications

Description

The is a low-power, low-jitter clock synthesizer designed to replace multiple crystals and oscillators in portable audio/video systems. The device generates a 37 MHz processor clock, a 48 MHz USB clock, a fixed 22.5792 MHz audio clock, a selectable 24.576 MHz or 22.5792 MHz audio clock, and a 27MHz reference clock for video. Using ICS' proprietary mix of analog and digital Phase-Locked Loop (PLL) technology, the device spreads the frequency spectrum of the 37 MHz output, reducing the peak amplitude to 16 dB. An output enable (OE) pin lowers the chip power consumption while tri-stating all outputs.

Features

Extremely low operating current (11 mA) Packaged in 20-pin QFN (Pb-free) Input crystal or clock frequency of 27 MHz Output reference frequency of 27 MHz Fixed output frequencies of 37 MHz, 48 MHz and 22.5792 MHz Selectable output frequency of either 22.5792 MHz or 24.576 MHz Configurable spread spectrum on 37 MHz output Operating core voltage 1.8 V Output voltage 2.5 V Advanced, low-power CMOS process

PLL4 27 MHz clock or crystal input X1 Crystal Oscillator/ Clock Buffer 5 GND

Power Output Power Input Power Output Power Input Power Output Power Output Power Output Connect to ground.

48 MHz clock output. High impedance state when OE=1. Output voltage level. Connect 2.5 V. Same voltage as pin 12. Output Enable pin. See table above. Internal pull-down resistor. Connect V. 22.5792 MHz clock output. Internal pull-down. High impedance state when OE=1. Connect to ground. I2C bus clock pin. Internal pull-up resistor. I2C bus data pin. Internal pull-up resistor. Connect to ground. Selectable output clock of either or 24.576M. See table. Internal pull-down. High impedance state. OE=1. Output voltage level. Connect 2.5 V. Same voltage as pin 3. Spread spectrum 37 MHz clock output. See table. Internal pull-down. High impedance state when OE=1. Connect +1.8 V. Connect to ground. Connect to ground. 27 MHz reference clock output. Internal pull-down. High impedance state when OE=1. 2

Connect to 27 MHz crystal or float for clock input. Crystal connection. Connect to 27 MHz crystal or clock input.

As with any high-performance mixed-signal IC, the ICS1493-17 must be isolated from system power supply noise to perform optimally. A decoupling capacitor of 0.01µF must be connected between each VDD and the PCB ground plane.

For optimum device performance and lowest output phase noise, the following guidelines should be observed. 1) The 0.01µF decoupling capacitors should be mounted on the component side of the board as close to the VDD pin as possible. No vias should be used between the decoupling capacitors and VDD pins. The PCB trace to VDD pins should be kept as short as possible, as should the PCB trace to the ground via. 2) The external crystal should be mounted just next to the device with short traces. The X1 and X2 traces should not be routed next to each other with minimum spaces, instead they should be separated and away from other traces. 3) To minimize EMI, the 33 series termination resistor should be placed close to the clock output. 4) An optimum layout is one with all components on the same side of the board, minimizing vias through other signal layers. Other signal traces should be routed away from the ICS1493-17. This includes signal traces just underneath the device, or on layers adjacent to the ground plane layer used by the device.

Clock output traces over one inch should use series termination. To series terminate a 50 trace (a commonly used trace impedance), place a 33 resistor in series with the clock line, as close to the clock output pin as possible. The nominal impedance of the clock output is 20.

No external crystal load capacitors are required. To save discrete component cost, the ICS1493-17 integrates on-chip capacitance to support a crystal with CL=10 pF. It is important to keep stray capacitance to a minimum by using very short PCB traces (and no vias) between the crystal and device.


 

Related products with the same datasheet
ICS1493K-17LF
ICS1493K-17LFT
Some Part number from the same manufacture Integrated Circuit System
ICS1493K-17LF Clock Synthesizer for Portable Systems
V104YLF 10 BIT LVDS Receiver FOR Video
V385AGT 8-bit LVDS Transmitter FOR Video
ICS842023AGI Femtoclocks˘â Crystal-to- HSTL Clock Generator
ICS93712YF-PPP-T 2 DIMM DDR Fanout Buffer
1527G1LF Video Clock Synthesizer
ICS3840BLF DDR Sdram MUX
ICS501MLF LOCO PLL Clock Multiplier
AG125 125mhz, Lvcmos/lvttl Oscillator Replacement
MN3006H/B High-accuracy 8-bit D/A Converters
DACHKB 12-bit D/A Converter with Input Register
MK3725S DUAL Output 3.3 VOLT VCXO
409MLF PC Peripheral Clock
MN3860H 12-bit D/A Converter with Input Register
SK3827 5.8W Audio Power AMP
0002A01L Femtoclocks˘â Crystal-to Lvcmos/lvttl Frequency Synthesizer
ICS663M PLL Building Block
M1033 VCSO Based Clock PLL WITH Autoswitch
ICS8745BY 1:5 Differential-to-lvds ZERO Delay Clock Generator
M840XA Oc-192 Multi-rate Clock Recovery Module
DACHKBCH 12-bit D/A Converter with Input Register

ICS650-21 : Systemperipheral Clock Source

ICS8430-111 : 700MHz, Low Jitter Differential to 3.3V Lvpecl Frequency Synthesizer

MK2705 : Audioclock Synthesizer

ICS84330CYI : 700mhz, LOW Jitter, Crystal-to-3.3v Differential Lvpecl Frequency Synthesizer

8304AM01 : LOW Skew, 1-to-4 Lvcmos / Lvttl Inverting Fanout Buffer

MN5142 : 8-bit A/D Converters

ICS552AR-01T : Oscillator, Multiplier, and Buffer with 8 Outputs

ICS839893AYIT : LOW Skew, 1-to-13 Lvcmos/lvttl Buffer Divider

ICS1893BKLF : 3.3-v 10base-t/100base-tx Integrated Phyceiver

ICS840004AGT : Femtoclocks˘â Crystal-to Lvcmos/lvttl Frequency Synthesizer

Same catergory

SN54S151 : Multiplexers.

XZDBW14C2 : Material (Color) = InGaN(White);; Lens = ;; Peak Wave Length = ;; Iv(ucd) If@10mA Min.= *36000;; Iv(ucd) If@10mA Typ.= *116500.

PM-V100053 : Versa-pac Inductors & Transformers. * Surface Mount with Six winding * Low radiated noise * Frequency range over * 500 VAC Isolation winding to winding 20381 BARENTS SEA CIRCLE, LAKE FOREST CA 92630 TEL: 949-452-0511 FAX: 949-452-0512 http://www.premiermag.com * Radial Format * Low DC Resistance * PCB Package * Fully Tinned Leads ELECTRICAL S AT 25OC .

KA78L09AMTF : 3-terminal 0.1A Positive Voltage Regulator. Maximum Output Current of 100mA Output Voltage 15V, 18V and 24V Thermal Overload Protection Short Circuit Current Limiting Output Voltage Offered in ±5% Tolerance The KA78LXXA/KA78L05AA series of fixed voltage monolithic integrated circuit voltage regulators are suitable for application that required supply current to 100mA. Parameter Input Voltage.

DPS12J12 : Dc-dc Converter.

SHP5-24D05 : Single and dual Output 3 to 5 Watt Wide Input Dc/dc Converters. to 5 Watts in DIL package 32 models including 2.1V and 3.3V outputs Wide input ranges 9-18V, 18-36V and 36-72V EN55022 conducted emissions level B Operating temperature range to +50°C Input voltage range to ETS300-132-2 The SHP5 Series of DC/DC converters is designed to offer the optimum cost/benefit power solution for a wide variety of applications.

842-800-1206-032 : STRAIN RELIEF, 16WAY. s: Series: 812 ; Accessory Type: Strain Relief ; For Use With: 812 Series IDC Socket Connector ; No. of Positions: 16 ; Strain Relief Material: -.

161-R30161-E : Power Entry Modules AC INLET PLUS SWITCH. s: Manufacturer: Kobiconn ; Product Category: Power Entry Modules ; RoHS:  Details ; Filtered: No ; Product: Modules ; Current Rating: 15 A ; Voltage Rating: 250 VAC ; Housing Material: Thermoplastic ; Mounting Style: Snap In ; Termination Style: Solder ; Connector Type: Inlet / Outlet ; Flammability Rating:.

CA3102E32-5SB : Aluminum, Olive Drab Cadmium Plated Panel Mount, Flange Circular Connectors, Interconnect Receptacle, Female Sockets; CONN RCPT 2 POS BOX MNT W/SKTS. s: Connector Type: Receptacle, Female Sockets ; Shell Size - Insert: 32-5 ; Mounting Type: Panel Mount, Flange ; Fastening Type: Bayonet Lock ; : - ; Packaging: Bulk ; Number of Positions: 2 ; Termination:.

TC7S32F(T5L,T) : Logic - Gate And Inverter Integrated Circuit (ics) OR Gate Cut Tape (CT) 2.6mA, 2.6mA 2 V ~ 6 V; IC GATE OR 2INPUT 5-SSOP. s: Number of Circuits: 1 ; Package / Case: 6-LSOP (0.063", 1.60mm Width) 5 Leads ; Logic Type: OR Gate ; Packaging: Cut Tape (CT) ; Mounting Type: Surface Mount ; Number of Inputs: 2 ; Current - Output High, Low: 2.6mA, 2.6mA ; Operating.

4608X-102-131LF : Resistor 130 Ohm 300mW 4 Resistors[number of pins] Pin Networks, Arrays; RES ARRAY 130 OHM 4 RES 8-SIP. s: Resistance (Ohms): 130 ; Tolerance: ±2% ; Power Per Element: 300mW ; Circuit Type: Isolated ; Number of Pins: 8 ; Packaging: Bulk ; Number of Resistors: 4 ; Package / Case: 8-SIP ; Mounting Type: Through Hole ; Temperature Coefficient: ±100ppm/°C.

1.5SMC250 : Tv - Diode Circuit Protection 214V 1500W; DIODE TVS 250V 1500W 10% UNI SMD. s: Package / Case: DO-214AB, SMC ; Packaging: Tape & Reel (TR) ; Polarization: Unidirectional ; Power (Watts): 1500W ; Voltage - Reverse Standoff (Typ): 214V ; Voltage - Breakdown: 237V ; Lead Free Status: Lead Free Compliant by Exemption ; RoHS Status: RoHS Compliant.

Z-15GK55 : SPDT Snap Action, Limit, Lever Switch On-Mom 540gf; SWITCH BASIC SPDT 15A SOLDER. s: Mounting Type: Chassis Mount ; Termination Style: Solder Lug ; Actuator Type: Round (Pin Plunger) ; Operating Force: 540gf ; Switch Function: On-Mom ; Circuit: SPDT ; Contact Rating @ Voltage: 15A @ 125VAC ; Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant.

HRM-202(09) : CABLE TERMINATED, MALE, RF CONNECTOR, SOLDER, PLUG. s: Gender: Male ; Impedance: 50-Ohm ; Frequency: 12.400 GHz ; VSWR: 1.35 1.

IDC08S60CE : 8 A, 600 V, SILICON CARBIDE, RECTIFIER DIODE. s: Rectifier Configuration / Technology: Schottky ; Package: 1.658 X 1.52 MM, DIE-1 ; Number of Diodes: 1 ; VRRM: 600 volts ; IF: 8000 mA.

SMR-214 : 810 MHz - 830 MHz RF/MICROWAVE I/Q MODULATOR, 8.5 dB CONVERSION LOSS-MAX. s: Product Type: I & Q Modulator ; Package Type: 8-PIN ; Carrier Frequency: 810 to 830 MHz.

1404016 : 15 A, MODULAR TERMINAL BLOCK, 2 ROWS, 1 DECK. s: Mounting Options: Universal Mounting Foot ; North American: 14 AWG ; Voltage Rating: 400 volts ; Current Rating: 15 amps ; Termination Options: Screw Clamp ; Approvals: CSA Mark (US, NRTL/C).

52277-0621 : 2 CONTACT(S), FEMALE, RIGHT ANGLE TELECOM AND DATACOM CONNECTOR, SOLDER, JACK. s: Applications: Telecom / Data / Network Connectors ; Gender: Female ; Termination Types: SOLDER ; Number of Contacts: 2.

 
0-C     D-L     M-R     S-Z