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Details, datasheet, quote on part number:ICS843004
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| Part: | ICS843004 |
| Category: | Timing Circuits => Clock Synthesizers |
| Description: | Femtoclocks LVCMOS/CRYSTAL-TO-<<<>>>3.3V Lvpecl Frequency Synthesizer.<<<>>>the ICS843004 is a 4 Output Lvpecl Synthesizer<<<>>>optimized to Generate Fibre Channel Reference<<<>>>clock Frequencies And is a Member of The<<<>>>hiperclockstm Family of High Performance Clock<<<>>>solutions From Ics. Using a 26.5625MHz 18pF<<<>>>parallel Resonant Crystal, The Following Frequencies CAN Be<<<>>>generated Based on The 2 Frequency Select Pins (F_SEL1:0):<<<>>>212.5MHz, 159.375MHz, 156.25, 106.25MHz, And 53.125MHz.<<<>>>The ICS843004 Uses Ics 3rd Generation Low Phase Noise Vco<<<>>>technology And CAN Achieve 1ps or Lower Typical RMS Phase<<<>>>jitter, Easily Meeting Fibre Channel Jitter Requirements. The<<<>>>ICS843004 is Packaged in a Small 24-pin Tssop Package.<<<>>>FEATURES<<<>>> Four 3.3V Lvpecl Outputs<<<>>> Selectable Crystal Oscillator Interface<<<>>>or Lvcmos/lvttl Single-ended Input<<<>>> Supports The Following Output Frequencies:<<<>>>212.5MHz, 159.375MHz, 156.25, 106.25MHz And 53.125MHz<<<>>> RMS Phase Jitter (637KHz - 10MHz): 0.724ps (typical)<<<>>> RMS Phase Noise at 212.5MHz (design Target)<<<>>>phase Noise:<<<>>>offset Noise Power<<<>>>100Hz ............... -94.9 DBc/Hz<<<>>>1KHz ..............-115.3 DBc/Hz<<<>>>10KHz ..............-123.2 DBc/Hz<<<>>>100KHz ...............-124.2dBc/Hz |
| Company: | Integrated Circuit System |
| Datasheet: | Download ICS843004 datasheet File size : 239 kB |
| Request For quote: | Find where to buy ICS843004
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Datasheet text preview:
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS843004
FEMTOCLOCKSTMLVCMOS/CRYSTAL-TO3.3V LVPECL FREQUENCY SYNTHESIZER
FEATURES
· Four 3.3V LVPECL outputs · Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input · Suppor ts the following output frequencies: 212.5MHz, 159.375MHz, 156.25, 106.25MHz and 53.125MHz · RMS phase jitter (637KHz - 10MHz): 0.724ps (typical) · RMS phase noise at 212.5MHz (design target) Phase noise: Offset Noise Power 100Hz ...... -94.9 dBc/Hz 1KHz ..... -115.3 dBc/Hz 10KHz ..... -123.2 dBc/Hz 100KHz ...... -124.2dBc/Hz · Full 3.3V supply mode · 0°C to 70°C ambient operating temperature
GENERAL DESCRIPTION
The ICS843004 is a 4 output LVPECL synthesizer optimized to generate Fibre Channel reference H iPer Cl ockSTM c l o c k frequencies and is a member of the HiPerClocksTM family of high performance clock solutions from ICS. Using a 26.5625MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL1:0): 212.5MHz, 159.375MHz, 156.25, 106.25MHz, and 53.125MHz. The ICS843004 uses ICS' 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Fibre Channel jitter requirements. The ICS843004 is packaged in a small 24-pin TSSOP package.
ICS
FREQUENCY SELECT FUNCTION TABLE
Input Frequency 26.5625 26.5625 26.5625 26.5625 26.04166 Inputs M Divider F_SEL1 F_SEL0 Value 0 0 24 0 1 1 0 1 0 1 1 24 24 24 24 N Divider Value 3 4 6 12 4 M/N Divider Value 8 6 4 2 6 Output Frequency Range 212.5 159.375 106.25 53.125 156.25
PIN ASSIGNMENT
nQ1 Q1 VC C o Q0 nQ0 MR nPLL_SEL nc VCCA F_SEL0 VCC F_SEL1 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 nQ2 Q2 VC C O Q3 nQ3 VEE nc n X TA L _ S E L TEST_CLK VEE XTAL_IN XTAL_OUT
ICS843004
BLOCK DIAGRAM
F _ S E L 0 Pulldown F _ S E L 1 Pulldown n P L L _ S E L Pulldown
24-Lead TSSOP 4.40mm x 7.8mm x 0.92mm package body G Package Top View
Q0
T E S T _ C L K Pulldown
26.5625MHz
1
1
XTAL_IN
0
XTAL_OUT n X TA L _ S E L Pulldown
Phase Detector
VCO 637.5MHz
(w/26.5625MHz Reference)
F_SEL1:0 0 0 ÷3 0 1 ÷4 1 0 ÷6 11 ÷12
nQO Q1 nQ1
0
Q2 nQ2
M = 24 (fixed)
Q3 nQ3
MR
Pulldown
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice. 843004AG www.icst.com/products/hiperclocks.html REV. A APRIL 15, 2004
1
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS843004
FEMTOCLOCKSTMLVCMOS/CRYSTAL-TO3.3V LVPECL FREQUENCY SYNTHESIZER
Type Description Differential output pair. LVPECL interface levels. Output supply pins. Differential output pair. LVPECL interface levels. Active HIGH Master Reset. When logic HIGH, the internal dividers are reset causing the true outputs Qx to go low and the inver ted outputs nQx Pulldown to go high. When logic LOW, the internal dividers and the outputs are enabled. LVCMOS/LVTTL interface levels. Selects between the PLL and TEST_CLK as input to the dividers. When Pulldown LOW, selects PLL (PLL Enable). When HIGH, deselects the reference clock (PLL Bypass). LVCMOS/LVTTL interface levels. No connect. Analog supply pin. Pulldown Frequency select pins. LVCMOS/LVTTL interface levels. Core supply pin. Parallel resonant cr ystal interface. XTAL_OUT is the output, XTAL_IN is the input. Negative supply pins. Pulldown LVCMOS/LVTTL clock input. Selects between cr ystal or TEST_CLK inputs as the the PLL Reference Pulldown source. Selects XTAL inputs when LOW. Selects TEST_CLK when HIGH. LVCMOS/LVTTL interface levels. Differential output pair. LVPECL interface levels. Differential output pair. LVPECL interface levels.
TABLE 1. PIN DESCRIPTIONS
Number 1, 2 3, 22 4, 5 6 Name nQ1, Q1 VCCO Q0, nQ0 MR Output Power Ouput Input
7 8, 18 9 10, 12 11 13, 14 15, 19 16 17 20, 21 23, 24
nPLL_SEL nc VCCA F_SEL0, F_SEL1 VCC XTAL_OUT, XTAL_IN VEE TEST_CLK nXTAL_SEL nQ3, Q3 Q2, nQ2
Input Unused Power Input Power Input Power Input Input Output Output
NOTE: Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol CIN RPULLDOWN Parameter Input Capacitance Input Pulldown Resistor Test Conditions Minimum Typical 4 51 Maximum Units pF K
843004AG
www.icst.com/products/hiperclocks.html
2
REV. A APRIL 15, 2004
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS843004
FEMTOCLOCKSTMLVCMOS/CRYSTAL-TO3.3V LVPECL FREQUENCY SYNTHESIZER
4.6V -0.5V to VCC + 0.5V 50mA 100mA 70°C/W (0 lfpm) -65°C to 150°C N OT E : Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC Inputs, VI Outputs, IO Continuous Current Surge Current Package Thermal Impedance, JA Storage Temperature, TSTG
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VCC = VCCA = VCCO = 3.3V±5%, TA = 0°C TO 70°C
Symbol VCC VCCA VCCO I EE ICCO Parameter Core Supply Voltage Analog Supply Voltage Output Supply Voltage Power Supply Current Output Supply Current Test Conditions Minimum 3.135 3.135 3.135 Typical 3.3 3.3 3.3 TBD TBD Maximum 3.465 3.465 3.465 Units V V V mA mA
TABLE 3B. LVCMOS / LVTTL DC CHARACTERISTICS, VCC = VCCA = VCCO = 3.3V±5%, TA = 0°C TO 70°C
Symbol VIH VIL Parameter Input High Voltage nPLL_SEL, nXTAL_SEL, Input F_SEL0, F_SEL1, MR Low Voltage TEST_CLK TEST_CLK, MR, Input F_SEL0, F_SEL1, High Current nPLL_SEL, nXTAL_SEL, TEST_CLK, MR, Input F_SEL0, F_SEL1, Low Current nPLL_SEL, nXTAL_SEL, Output High Voltage; NOTE 1 Test Conditions Minimum Typical 2 -0.3 -0.3 VCC = VIN = 3.465V Maximum VCC + 0.3 0.8 1.3 150 Units V V V µA
IIH
IIL VOH
VCC = 3.465V, VIN = 0V VCCO = 3.465V
-150 2.6 0.5
µA V V
Output Low Voltage; NOTE 1 VCCO = 3.465V VOL NOTE 1: Outputs terminated with 50 to VCCO/2. In the Parameter Measurement Information Section, see Output Load Test Circuit Diagram.
843004AG
www.icst.com/products/hiperclocks.html
3
REV. A APRIL 15, 2004
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