SL2304NZ

Preliminary SL2304NZ Low Jitter and Skew DC to 160MHz Clock Buffer Key Features DC to 160 MHz operating frequency range Low output clock skew: 50ps-typ Low part-to-part output skew: 90 ps-typ 3.3V +/-10% operation supply voltage Low power dissipation: - 7 mA-typ at 33MHz - 8 mA-typ at 66MHz - 12 mA-typ at 133MHz One input to four output fanout buffer drivers Output Enable (OE) control function Available in 8-pin TSSOP package Available in Commercial and Industrial grades Available in Lead (Pb) free package Description The SL2304NZ is a low skew, jitter and power fanout Buffer designed to produce up to four (4) clock outputs from one (1) reference input clock, for high speed clock distribution, including PCI/PCI-X applications. The SL2304NZ products operate from DC to 160MHz. The only difference between SL2304NZ-1 and SL2304NZ1Z is the OE logic implementation. Refer to the Available OE Logic Configuration Table. 1 Refer to SL23EP04NZ products for DC to 220MHz-max frequency range, 2.5V to 3.3V power supply operation, improved skew, jitter and higher drive options. Benefits Up to four (4) distribution of input clock Low skew Low Jitter Low power dissipation Applications General Purpose PCI/PCI-X Clock Buffer Printers, MFPs and Digital Copiers PCs and Work Stations Routers, Switchers and Servers Datacom and Telecom High-Speed Digital Embeded Systems Block Diagram Rev 1.3, May 16, 2007 Page 1 of 9 2200 Laurelwood Road, Santa Clara, CA 95054 Tel: (408) 855-0555 Fax: (408) 855-0550 www.SpectraLinear.com SL2304NZ Pin Configuration 8-Pin TSSOP Pin Description Pin Number 1 2 3 4 5 6 7 8 Pin Name CLKIN OE CLK1 GND CLK2 VDD CLK3 CLK4 Pin Type Input Output Output Power Output Output Power Input Reference Clock Input Pin Description Output Enable. Refer to the Table. 1 for Logic Table Buffered Clock Output 1 Power Ground. Buffered Clock Output 2 3.3V Power Supply Buffered Clock Output 3 Buffered Clock Output 4 Rev 1.3, May 16, 2007 Page 2 of 9 SL2304NZ General Description The SL2304NZ is a low skew, jitter and power fanout Buffer designed to produce up to four (4) clock outputs from one (1) reference input clock, for high speed clock distribution, including PCI/PCI-X applications. Output Clock Skew All outputs should drive the similar load to achieve outputto-output skew and input-to-output delay specifications as given in the switching electrical tables. Input and output Frequency Range The input and output frequency is the same (1x) for SL2304NZ-1 and SL2304NZ-1Z and operates from DC to 160MHz clock range with up to 25pF output load. Power Supply Range (VDD) The SL2304NZ is designed to operate 3.3V+/-10% (3.63Vmax to 2.97V-min) VDD power supply range. An internal on-chip voltage regulator is used to provide to constant power supply of 1.8V, leading to a consistent and stable electrical performance in terms of skew and jitter. The SL2304NZ I/O is powered by using VDD. Refer to SL23EP04NZ products for DC to 220MHz-max frequency range, 2.5V to 3.3V power supply operation, improved skew, jitter and higher drive options. Contact SLI for 1.8V power supply Fan-Out Buffer and ZDB products. OE (Output Enable) Function The only difference between SL2304-1 and SL2304NZ1Z is the OE logic implementation. When OE=0, SL2404NZ-1 outputs are disabled and outputs are at Logic Low. In the case of SL2304NZ-1Z the outputs are at High-Z. Refer to the Available OE Logic Configuration Table. 1 below. CLKIN (Pin-1) Low High Low High OE (Pin-2) Low Low High High SL2304NZ-1 CLKOUT [1:4] Low Low Low High SL2304NZ-1Z CLKOUT [1:4] High-Z High-Z Low High Table 1. Available SL2304 CLKIN and OE Logic Configurations Rev 1.3, May 16, 2007 Page 3 of 9 SL2304NZ Absolute Maximum Ratings (All Products) Description Supply voltage, VDD All Inputs and Outputs Ambient Operating Temperature Ambient Operating Temperature Storage Temperature Junction Temperature Soldering Temperature ESD Rating (Human Body Model) MIL-STD-883, Method 3015 In operation, C-Grade In operation, I-Grade No power is applied In operation, power is applied Condition Min -0.5 -0.5 0 -40 -65 – – 2000 Max 4.6 VDD+0.5 70 85 150 125 260 – Unit V V °C °C °C °C °C V Operating Conditions (C-Grade and VDD=3.3V) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range 0 to +70°C Description Operating Voltage Operating Temperature Input Capacitance Output Capacitance Load Capacitance Symbol VDD TA VIH COUT CL Condition VDD+/-10% Ambient Temperature Pins 1 and 2 Pins 3, 5, 7 and 8 Pins 3, 5, 7 and 8 Min 2.97 0 – – – Typ 3.3 – 5 3 – Max 3.63 70 7 5 30 Unit V °C pF pF pF DC Electrical Characteristics (C-Grade and VDD=3.3V) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range 0 to +70°C Description Input Low Voltage Input High Voltage Input Low Current Input High Current Output Low Voltage Symbol VINL VINH IINL IINH VOL1 VOL2 Condition CLKIN and OE CLKIN and OE 0 < VIN < 0.8V 2.4V < VIN < VDD IOL=24mA IOL=12mA IOH=-24mA IOH=-12mA CLKIN=33MHz CL=0 (No load at outputs) CLKIN=66MHz CL=0 (No load at outputs) CLKIN=133MHz CL=0 (No load at outputs) Min – 2.0 -5 -5 – – 2.0 2.4 – – – Typ – – +/-2 +/-2 – – – – 7 8 12 Max 0.8 VDD+0.3 5 5 0.80 0.55 – – 10 12 18 Unit V V µA µA V V V V mA mA mA Output High Voltage VOH1 VOH1 Power Supply Current Power Supply Current Power Supply Current IDD1 IDD2 IDD3 Rev 1.3, May 16, 2007 Page 4 of 9 SL2304NZ Switching Electrical Characteristics (C-Grade and VDD=3.3V) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range 0 to +70°C Description Output Frequency Range Input Duty Cycle Output Duty Cycle Output Duty Cycle Output Rise Time Output Fall Time CLKIN High or Low Time Symbol FOUT DC1 DC2 DC3 tr tf tHL CL=25pf Condition Min 0 20 45 45 – – 5 2 – – Typ – 50 50 50 – – – – 50 90 Max 160 80 55 55 1.5 1.5 – – 100 200 Unit MHz % % % ns ns ns ns ps ps Measured at VDD/2 CL=15pF, Fout=66 MHz Measured at VDD/2 CL=15pF, Fout=133 MHz Measured at VDD/2 CL=25pF, measured at 0.8V to 2.0V CL=25pF, all versions, measured at 0.8V to 2.0V CLKIN=66MHz, CL=15pF CLKIN=140MHz, CL=15pF Output to Output Skew Part to Part Skew SKW1 SKW2 Measured at VDD/2 and Outputs are equally loaded Measured at VDD/2 and Outputs are equally loaded Measured at VDD/2 from CLKIN to Output Clock rising edge and Outputs are equally loaded CLKIN=66MHz and CL=0 (No Load) CLKIN=133MHz and CL=0 (No Load) Propagation Delay Time Cycle-to-Cycle Jitter Cycle-to-Cycle Jitter PDT CCJ1 CCJ2 – – – 3.0 60 45 3.8 120 90 ns ps ps Rev 1.3, May 16, 2007 Page 5 of 9 SL2304NZ Operating Conditions (I-Grade and VDD=3.3V) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -40 to +85°C Description Operating Voltage Operating Temperature Input Capacitance Output Capacitance Load Capacitance Symbol VDD TA VIH COUT CL Condition VDD+/-10% Ambient Temperature Pins 1 and 2 Pins 3, 5, 7 and 8 Pins 3, 5, 7 and 8 Min 2.97 -40 – – – Typ 3.3 – 6 4 – Max 3.63 85 8 6 25 Unit V °C pF pF pF DC Electrical Characteristics (I-Grade and VDD=3.3V) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -40 to +85°C Description Input LOW Voltage Input HIGH Voltage Input LOW Current Input HIGH Current Output Low Voltage Symbol VINL VINH IINL IINH VOL Condition CLKIN and OE CLKIN and OE 0 < VIN < 0.8V 2.4V < VIN < VDD IOL=24mA IOL=12mA Min – 2.0 -6 -6 – – 2.0 2.4 – – – Typ – – +/-3 +/-3 – – – – 8 9 14 Max 0.8 VDD+0.3 6 6 0.80 0.55 – – 11 13 20 Unit V V µA µA V V V V mA mA mA Output High Voltage VOH IOH=-24mA IOH=-12mA Power Supply Current Power Supply Current Power Supply Current IDD1 IDD2 IDD3 CLKIN=33MHz CL=0 (No load at outputs) CLKIN=66MHz CL=0 (No load at outputs) CLKIN=133MHz CL=0 (No load at outputs) Switching Electrical Characteristics (I-Grade and VDD=3.3V) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -40 to +85°C Description Output Frequency Range Input Duty Cycle Output Duty Cycle Output Duty Cycle Symbol FOUT DC1 DC2 DC3 CL=25pf Condition Min 0 20 45 45 Typ – 50 50 50 Max 160 80 55 55 Unit MHz % % % Measured at VDD/2 CL=15pF, Fout=66 MHz Measured at VDD/2 CL=15pF, Fout=133 MHz Measured at VDD/2 Rev 1.3, May 16, 2007 Page 6 of 9 SL2304NZ Switching Electrical Characteristics (I-Grade and VDD=3.3V – Cont.) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -40 to +85°C Output Fall Time CLKIN High or Low Time tf tHL CL=25pF, measured at 0.8V to 2.0V CLKIN=66MHz, CL=15pF CLKIN=140MHz, CL=15pF Output to Output Skew Part to Part Skew SKW1 SKW2 Measured at VDD/2 and Outputs are equally loaded Measured at VDD/2 and Outputs are equally loaded Measured at VDD/2 from CLKIN to Output Clock rising edge and Outputs are equally loaded CLKIN=66MHz and CL=0 (No Load) CLKIN=133MHz and CL=0 (No Load) – 5 2 – – – – – 50 90 1.6 – – 100 200 ns ns ns ps ps Propagation Delay Time Cycle-to-Cycle Jitter Cycle-to-Cycle Jitter PDT CCJ1 CCJ2 – – – 3.2 70 50 4.0 140 100 ns ps ps External Components & Design Considerations Typical Application Schematic Comments and Recommendations Decoupling Capacitor: A decoupling capacitor of 0.1 F must be used between VDD and VSS pins. Place the capacitor on the component side of the PCB as close to the VDD pin as possible. The PCB trace to the VDD pin and to the GND via should be kept as short as possible. Do not use vias between the decoupling capacitor and the VDD pin. Series Termination Resistor: A series termination resistor is recommended if the distance between the output clocks and the load is over 1 ½ inch. Place the series termination resistors as close to the clock outputs as possible. Rev 1.3, May 16, 2007 Page 7 of 9 SL2304NZ Package Outline and Package Dimensions 8-Pin TSSOP (4.4 mm) Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case Symbol JA JA JA JC Condition Still air 1m/s air flow 3m/s air flow Independent of air flow Min - Typ 110 100 80 35 Max - Unit °C/W °C/W °C/W °C/W Rev 1.3, May 16, 2007 Page 8 of 9 SL2304NZ Ordering Information [3] Ordering Number SL2304NZZC-1 SL2304NZZC-1T SL2304NZZI-1 SL2304NZZI-1T SL2304NZZC-1Z SL2304NZZC-1ZT SL2304NZZI-1Z SL2304NZZI-1ZT Marking SL2304NZZC-1 SL2304NZZC-1 SL2304NZZI-1 SL2304NZZI-1 SL2304NZZC-1Z SL2304NZZC-1Z SL2304NZZI-1Z SL2304NZZI-1Z Shipping Package Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel Package 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP 8-pin TSSOP Temperature 0 to 70°C 0 to 70°C -40 to 85°C -40 to 85°C 0 to 70°C 0 to 70°C -40 to 85°C -40 to 85°C Notes: 3. The SL2304NZ products are RoHS compliant. While SLI has reviewed all information herein for accuracy and reliability, Spectra Linear Inc. assumes no responsibility for the use of any circuitry or for the infringement of any patents or other rights of third parties which would result from each use. This product is intended for use in normal commercial applications and is not warranted not is it intended for use in life support, critical medical instruments, or any other application requiring extended temperature range, high reliability, or any other extraordinary environmental requirements unless pursuant to additional processing by Spectra Linear Inc., and an expressed written agreement by Spectra Linear Inc. Spectra Linear Inc. reserves the right to change any circuitry or specification without notice. Rev 1.3, May 16, 2007 Page 9 of 9