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| CY2309NZ Nine Output, 3.3V SDRAM Buffer for 2 DIMMs or 4 SO-DIMMs Features * One input to nine output buffer/driver * Supports two SDRAM DIMMs or four SO-DIMMs with one additional output for feedback to an external or chipset PLL * Low power consumption for mobile applications -- Less than 25 mA at 66.6 MHz with unloaded outputs * 8.7-ns Input-Output delay * Buffers all frequencies from DC to 100 MHz * Output-output skew less than 250 ps * Multiple VDD and VSS pins for noise and EMI reduction * Space-saving 16-pin 150-mil SOIC package * 3.3V operation Functional Description The CY2309NZ is a low-cost SDRAM buffer designed to distribute high-speed clocks in mobile PC systems and desktop PC systems with SDRAM support. The part has nine outputs, eight of which can be used to drive 2 DIMMs or 4 SO-DIMMs, and the remaining can be used for external feedback to a PLL. The device operates at 3.3V and outputs can run up to 100 MHz, making it compatible with Pentium II(R) processors and 100-MHz chipsets. The CY2309NZ can be used in conjunction with the CY2281, CY2282, CY2283, CY2284 or similar clock synthesizers for a full Pentium II motherboard solution. The CY2309NZ is designed for low EMI and power optimization. It has multiple VSS and VDD pins for noise optimization and consumes less than 25 mA at 66.6 MHz, making it ideal for the low power requirements of mobile systems. It is available in an ultra-compact 150-mil 16-pin SOIC package. Block Diagram BUF_IN SDRAM1 SDRAM2 SDRAM3 SDRAM4 SDRAM5 SDRAM6 SDRAM7 SDRAM8 SDRAM9 Pin Configuration 16 SOIC Top View BUF_IN SDRAM1 SDRAM2 V DD GND SDRAM3 SDRAM4 V DD 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 SDRAM9 SDRAM8 SDRAM7 VDD GND SDRAM6 SDRAM5 GND Pin Description for CY2309NZ Signal VDD GND BUF_IN SDRAM [1:9] Pin 4, 8, 13 5, 9, 12 1 2, 3, 6, 7, 10, 11, 14, 15, 16 3.3V Digital Voltage Supply Ground Input Clock SDRAM Clock Outputs Description Intel and Pentium are registered trademarks of Intel Corporation. Cypress Semiconductor Corporation * 3901 North First Street * San Jose * CA 95134 * 408-943-2600 October 14, 1999 CY2309NZ Maximum Ratings Supply Voltage to Ground Potential ............... -0.5V to +7.0V DC Input Voltage (Except REF) ............-0.5V to VDD + 0.5V DC Input Voltage REF......................................... -0.5V to 7V Storage Temperature ................................. -65C to +150C Max. Soldering Temperature (10 sec.) ....................... 260C Junction Temperature ................................................. 150C Static Discharge Voltage (per MIL-STD-883, Method 3015) ............................ >2,000V Operating Conditions Parameter VDD TA CL CIN BUF_IN, SDRAM [1:9] Supply Voltage Operating Temperature (Ambient Temperature) Load Capacitance Input Capacitance Operating Frequency DC Description Min. 3.0 0 Max. 3.6 70 30 7 100 Unit V C pF pF MHz Electrical Characteristics Parameter VIL VIH IIL IIH VOL VOH IDD Description Input LOW Voltage [1] [1] Test Conditions Min. 2.0 Max. 0.8 Unit V V A A V V mA Input HIGH Voltage Input LOW Current Input HIGH Current VIN = 0V VIN = V DD [2] [2] 50.0 100.0 0.4 2.4 35 Output LOW Voltage Supply Current IOL = 8 mA IOH = -8 mA Unloaded outputs at 66.66 MHz, SEL inputs at VDD or GND Output HIGH Voltage Switching Characteristics [3] Over the Operating Range Parameter t3 t4 t5 t6 Rise Time Fall Time Name Duty Cycle [2] Description Measured at 1.4V Measured between 0.8V and 2.0V Measured between 0.8V and 2.0V All outputs equally loaded Measured at VDD/2 Min. 40.0 Typ. 50.0 Max. 60.0 1.50 1.50 250 Unit % ns ns ps ns = t2 / t1 [2] [2] Output to Output Skew[2] Propagation Delay, BUF_IN Rising Edge to SDRAM Rising Edge[2] 1 5 8.7 Notes: 1. BUF_IN input has a threshold voltage of VDD/2. 2. Parameter is guaranteed by design and characterization. Not 100% tested in production. 3. All parameters specified with loaded outputs. 2 CY2309NZ Switching Waveforms Duty Cycle Timing t1 t2 1.4V 1.4V 1.4V All Outputs Rise/Fall Time 2.0V 0.8V t3 2.0V 0.8V t4 3.3V 0V OUTPUT Output-Output Skew OUTPUT 1.4V OUTPUT t5 1.4V Input-Output Propagation Delay INPUT VDD /2 OUTPUT t6 VDD/2 3 CY2309NZ Test Circuits VDD 0.1 F CLK out OUTPUTS C LOAD VDD 0.1 F GND GND Ordering Information Ordering Code CY2309NZSC-1H Document #: 38-00709-C Package Name S16 Package Type 16-pin 150-mil SOIC Operating Range Commercial Package Diagram 16-Lead (150-Mil) Molded SOIC S16 51-85068-A (c) Cypress Semiconductor Corporation, 1999. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. |
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