SL2304NZ Low Jitter and Skew DC to 140MHz Clock Buffer Key Features Description • DC to 140 MHz operating frequency range • Low output clock skew: 50ps-typ • Low part-to-part output skew: 100 ps-typ • Low output propogation delay: 2.5ns-typ • 3.3V +/-10% operation supply voltage • Low power dissipation: • • • • 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 140MHz. - 7 mA-typ at 33MHz - 9 mA-typ at 66MHz - 12 mA-typ at 133MHz One input to four output fanout buffer drivers Refer to SL23EP04NZ products for DC to 220MHz-max frequency range and 2.5V to 3.3V power supply operation, improved skew, jitter and higher drive options. Benefits • Output Enable (OE) control function • Available in 8-pin TSSOP package • Available in Commercial and Industrial grades • Available in Lead (Pb) free package Applications • • • • • • The only difference between SL2304NZ-1 and SL2304NZ1Z is the OE logic implementation. Refer to the Available OE Logic Configuration Table. 1 General Purpose PCI/PCI-X Clock Buffer Printers, MFPs and Digital Copiers PCs and Work Stations Routers, Switches and Servers Datacom and Telecom High-Speed Digital Embeded Systems • • • • • Up to four (4) distribution of input clock Low propogation delay Low output-to-output skew Low output clock Jitter Low power dissipation Block Diagram Logic Control OE CLK1 CLK2 CLKIN CLK3 CLK4 VDD GND Rev 2.1, May 6, 2008 2400 West Cesar Chavez, Austin, TX 78701 Page 1 of 9 1+(512) 416-8500 1+(512) 416-9669 www.silabs.com SL2304NZ Pin Configuration CLKIN 1 8 CLK4 OE 2 7 CLK3 CLK1 3 6 VDD GND 4 5 CLK2 8-Pin TSSOP Pin Description Pin Number Pin Name Pin Type 1 CLKIN Input 2 OE Output Output Enable. Refer to the Table. 1 for Logic Table 3 CLK1 Output Buffered Clock Output 1 4 GND Power Power Ground. 5 CLK2 Output Buffered Clock Output 2 6 VDD Output 3.3V Power Supply 7 CLK3 Power Buffered Clock Output 3 8 CLK4 Input Buffered Clock Output 4 Rev 2.1, May 6, 2008 Pin Description Reference Clock Input Page 2 of 9 SL2304NZ General Description Output Clock Skew 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. 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. Power Supply Range (VDD) 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 140MHz clock range with up to 25pF output load. 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. 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. CLKIN (Pin-1) OE (Pin-2) SL2304NZ-1 CLKOUT [1:4] SL2304NZ-1Z CLKOUT [1:4] Low Low Low High-Z High Low Low High-Z Low High Low Low High High High High Table 1. Available SL2304 CLKIN and OE Logic Configurations Rev 2.1, May 6, 2008 Page 3 of 9 SL2304NZ Absolute Maximum Ratings (All Products) Description Condition Min Max Unit Supply voltage, VDD -0.5 4.6 V All Inputs and Outputs -0.5 VDD+0.5 V Ambient Operating Temperature In operation, C-Grade 0 70 °C Ambient Operating Temperature In operation, I-Grade -40 85 °C Storage Temperature No power is applied -65 150 °C Junction Temperature In operation, power is applied – 125 °C – 260 °C Soldering Temperature ESD Rating (Human Body Model) JEDEC22-A114D -4,000 4,000 V ESD Rating (Charge Device Model) JEDEC22-C101C -1,500 1,500 V ESD Rating (Machine Model) JEDEC22-A115D -200 200 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 Symbol VDD Condition VDD+/-10% Min Typ Max Unit 2.97 3.3 3.63 V Operating Temperature TA Ambient Temperature 0 – 70 °C Input Capacitance VIH Pins 1 and 2 – 3 5 pF CL1 All outputs≤100MHz – – 30 pF CL2 All outputs≤140MHz – – 15 pF Output Capacitance Input Operating Frequency CLKIN Input Clock Range DC – 140 MHz Input Operating Frequency CLKN2 Input Clock Range, CL=30pF DC – 100 MHz Rev 2.1, May 6, 2008 Page 4 of 9 SL2304NZ 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 Symbol Condition Min Typ Max Unit Input Low Voltage VINL CLKIN and OE – – 0.8 V Input High Voltage VINH CLKIN and OE 2.0 – VDD+0.3 V Input Low Current IINL 0 < VIN < 0.8V -5 +/-2 5 µA Input High Current IINH 2.4V < VIN < VDD -5 +/-2 5 µA VOL1 IOL=24mA – – 0.80 V VOL2 IOL=12mA – – 0.55 V VOH1 IOH=-24mA 2.0 – – V VOH1 IOH=-12mA 2.4 – – V Power Supply Current IDD1 CLKIN=33MHz CL=0 (No load at outputs) – 7 11 mA Power Supply Current IDD2 CLKIN=66MHz CL=0 (No load at outputs) – 9 14 mA Power Supply Current IDD3 CLKIN=133MHz CL=0 (No load at outputs) – 12 18 mA Output Low Voltage Output High Voltage 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 Symbol Condition Min Typ Max Unit FOUT1 CL=15pF DC – 140 MHz FOUT1 CL=30pF DC – 100 MHz Output Frequency Range Output Rise/Fall Time tr/f-1 Measured at 0.8V to 2.0V CL=15pF – – 2.0 ns Output Rise/Fall Time tr/f-2 Measured at 0.8V to 2.0V CL=30pF – – 2.4 ns Input Duty Cycle DC1 Measured at VDD/2 20 50 80 % Output Duty Cycle DC2 CL=15pF, Fout=140MHz Measured at VDD/2 45 – 55 % Output Duty Cycle DC3 CL=30pF, Fout=100MHz Measured at VDD/2 40 – 60 % Output to Output Skew SKW1 Measured at VDD/2 and Outputs are equally loaded – 50 100 ps Part to Part Skew SKW2 Measured at VDD/2 and Outputs are equally loaded – 100 200 ps 1.5 2.5 3.5 ns Propagation Delay Time PDT Measured at VDD/2 from CLKIN to Output Clock rising edge Cycle-to-Cycle Jitter CCJ1 CLKIN=66MHz and CL=15 – 75 150 ps Cycle-to-Cycle Jitter CCJ2 CLKIN=133MHz and CL=15 – 50 100 ps Rev 2.1, May 6, 2008 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 Symbol VDD Condition Min Typ Max Unit VDD+/-10% 2.97 3.3 3.63 V -40 – 85 °C Operating Temperature TA Ambient Temperature Input Capacitance VIH Pins 1 and 2 – 3 6 pF CL1 All outputs≤100MHz – – 30 pF CL2 All outputs≤140MHz – – 15 pF Output Capacitance Input Operating Frequency CLKN1 Input Clock Range, CL=15pF DC – 140 MHz Input Operating Frequency CLKN2 Input Clock Range, CL=30pF DC – 100 MHz 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 Symbol Condition Min Typ Max Unit Input LOW Voltage VINL CLKIN and OE – – 0.8 V Input HIGH Voltage VINH CLKIN and OE 2.0 – VDD+0.3 V Input LOW Current IINL 0 < VIN < 0.8V -6 +/-3 6 µA Input HIGH Current IINH 2.4V < VIN < VDD -6 +/-3 6 µA IOL=24mA – – 0.80 V Output Low Voltage VOL IOL=12mA – – 0.55 V IOH=-24mA 2.0 – – V IOH=-12mA 2.4 – – V Output High Voltage VOH Power Supply Current IDD1 CLKIN=33MHz CL=0 (No load at outputs) – 8 12 mA Power Supply Current IDD2 CLKIN=66MHz CL=0 (No load at outputs) – 10 15 mA Power Supply Current IDD3 CLKIN=133MHz CL=0 (No load at outputs) – 14 20 mA Rev 2.1, May 6, 2008 Page 6 of 9 SL2304NZ 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 Symbol Condition Min Typ Max Unit FOUT1 CL=15pF DC – 140 MHz FOUT2 CL=30pF DC – 100 MHz Output Frequency Range Output Rise/fall Time tr/f-1 CL=15pF, measured at 0.8V to 2.0V – – 2.2 ns Output Rise/Fall Time tr/f-2 CL=30pF, measured at 0.8V to 2.0V – – 2.6 ns Input Duty Cycle DC1 Measured at VDD/2 20 – 80 % Output Duty Cycle DC2 CL=15pF, Fout=140MHz Measured at VDD/2 45 – 55 % Output Duty Cycle DC3 CL=30pF, Fout=100MHz Measured at VDD/2 40 – 60 % Output to Output Skew SKW1 Measured at VDD/2 and Outputs are equally loaded – 60 120 ps Part to Part Skew SKW2 Measured at VDD/2 and Outputs are equally loaded – 120 240 ps 1.2 2.5 3.8 ns Propagation Delay Time PDT Measured at VDD/2 from CLKIN to Output Clock rising edge and Outputs are equally loaded Cycle-to-Cycle Jitter CCJ1 CLKIN=66MHz and CL=15 – 80 160 ps Cycle-to-Cycle Jitter CCJ2 CLKIN=133MHz and CL=15 – 60 120 ps External Components & Design Considerations Typical Application Schematic CLKIN 1 CLK1 3 CL 5 VDD 6 SL2304NZ CLK2 CL 0.1μF CLK3 7 CL OE 2 4 8 CLK4 CL GND Recommendations Decoupling Capacitor: A decoupling capacitor of 0.1μF 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. Rev 2.1, May 6, 2008 Page 7 of 9 SL2304NZ Package Outline and Package Dimensions 8-Pin TSSOP (4.4 mm) 8 5 6.250(0.246) 6.500(0.256) 4.300(0.169) 4.500(0.177) Dimensions are in milimeters(inches). Top line: (MIN) and Bottom line: (Max) Pin-1 ID 1 4 2.900(0.114) 3.100(0.122) 1.100(0.043) MAX 0.190(0.007) 0.300(0.012) 0.250(0.010) BSC 0.050(0.002) 0.150(0.006) 0.850(0.033) 0.950(0.037) 0.076(0.003) 0.650(0.025) BSC 0.090(0.003) 0.200(0.008) Gauge Plane Seating Plane 0 to 8° 0.500(0.020) 0.700(0.027) Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case Rev 2.1, May 6, 2008 Symbol Condition Min Typ Max Unit θ JA Still air - 110 - °C/W θ JA 1m/s air flow - 100 - °C/W θ JA 3m/s air flow - 80 - °C/W θ JC Independent of air flow - 35 - °C/W Page 8 of 9 SL2304NZ Ordering Information [1] Ordering Number Marking Shipping Package Package Temperature SL2304NZZC-1 SL2304NZC-1 Tube 8-pin TSSOP 0 to 70°C SL2304NZZC-1T SL2304NZC-1 Tape and Reel 8-pin TSSOP 0 to 70°C SL2304NZZI-1 SL2304NZI-1 Tube 8-pin TSSOP -40 to 85°C SL2304NZZI-1T SL2304NZI-1 Tape and Reel 8-pin TSSOP -40 to 85°C SL2304NZZC-1Z SL2304NZC-1Z Tube 8-pin TSSOP 0 to 70°C SL2304NZZC-1ZT SL2304NZC-1Z Tape and Reel 8-pin TSSOP 0 to 70°C SL2304NZZI-1Z SL2304NZI-1Z Tube 8-pin TSSOP -40 to 85°C SL2304NZZI-1ZT SL2304NZI-1Z Tape and Reel 8-pin TSSOP -40 to 85°C Notes: 1. The SL2304NZ products are RoHS compliant. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Rev 2.1, May 6, 2008 Page 9 of 9