PLL103-02 DDR SDRAM Buffer for Desktop PCs with 4 DDR DIMMS FEATURES • • • Generates 24 output buffer from one input. Supports up to four DDR DIMMS or 2 SDRAM DIMMS. Supports 266MHz DDR SDRAM. One additional output for feedback. Less than 5ns delay. Skew between any outputs is less than 100 ps. 2.5V or 3.3V Supply range. Enhanced DDR and SDRAM Output Drive selected by I2C. Available in 48 pin SSOP. BLOCK DIAGRAM DDR0T SDATA SCLK I2C Control FBOUT 1 48 SEL_DDR VDD3.3_2.5 GND 2 3 47 46 VDD2.5 GND DDR0T DDR0C 4 5 45 44 DDR11T DDR11C DDR1T_SDRAM0 DDR1C_SDRAM1 6 43 42 DDR10T DDR10C 41 40 VDD2.5 GND 39 38 DDR9T DDR9C 37 36 VDD2.5 PD# 35 34 GND DDR8T 33 32 DDR8C VDD2.5 VDD3.3_2.5 GND 7 8 9 PLL103-02 • • • • • • PIN CONFIGURATION DDR2T_SDRAM2 DDR2C_SDRAM3 10 11 VDD3.3_2.5 BUF_IN 12 13 GND DDR3T_SDRAM4 14 15 DDR3C_SDRAM5 VDD3.3_2.5 16 17 GND DDR4T_SDRAM6 18 19 31 30 GND DDR7T DDR4C_SDRAM7 DDR5T 20 21 29 28 DDR7C DDR6T DDR5C VDD3.3_2.5 22 23 27 26 DDR6C GND SDATA 24 25 SCLK DDR0C DDR1T_SDRAM0 Note: #: Active Low DDR1C_SDRAM1 DDR2T_SDRAM2 DDR2C_SDRAM3 DDR3T_SDRAM4 DDR3C_SDRAM5 DDR4T_SDRAM6 BUF_IN DDR4C_SDRAM7 DDR5T DDR5C DDR6T DDR6C DDR7T DDR7C DDR8T DESCRIPTIONS The PLL103-02 is designed as a 3.3V/2.5V buffer to distribute high-speed clocks in PC applications. The device has 24 outputs. These outputs can be configured to support four unbuffered DDR DIMMS or to support 2 unbuffered standard SDRAM DIMMS and 2 DDR DIMMS. The PLL103-02 can be used in conjunction with the PLL202-04 or similar clock synthesizer for the VIA Pro 266 chipset. The PLL103-02 also has an I2C interface, which can enable or disable each output clock. When power up, all output clocks are enabled (has internal pull up). DDR8C DDR9T DDR9C DDR10T DDR10C DDR11T DDR11C PD# 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 11/07/00 Page 1 PLL103-02 DDR SDRAM Buffer for Desktop PCs with 4 DDR DIMMS PIN DESCRIPTIONS Name Number Type Description FBOUT 1 O Feedback clock for chipset. Output voltage depends on VDD3.3_2.5V. BUF_IN 13 I Reference input from chipset. 3.3V input for STANDARD SDRAM mode; 2.5V input for DDR-ONLY mode. PD 36 I Power Down Control input. When low, it will tri-state all outputs. SEL_DDR 48 I Input configure for DDR-ONLY mode or STANDARD SDRAM mode. 1 = DDR-ONLY mode (when VDD3.3_2.5 select 2.5V); 0 = STANDARD SDRAM mode (when VDD3.3_2.5 select 3.3V). In DDR-ONLY mode, pin 4, 5, 6, 7, 10, 11, 15, 16, 19, 20, 21, 22, 27, 28, 29, 30, 33, 34, 38, 39, 42, 43, 44 and 45 will be configured as DDR outputs. In STANDARD SDRAM mode, pin 6, 7, 11, 15, 16, 19 and 20 will be configured as STANDARD SDRAM outputs. Pin 27, 28, 29, 30, 33, 34, 38, 39, 42, 43, 44 and 45 will be configured as DDR outputs. Pin 4, 5, 21 and 22 will be Tri-stated. DDR[0,5:11]T 4,21,28,30,34, 39,43,45 O These outputs provide True copies of BUF_IN. DDR[0,5:11]C 5,22,27,29,33, 38,42,44 O These outputs provide complementary copies of BUF_IN. DDR[1:4]T_SDRA M [0,2,4,6] 6,10,15,19 O When SEL_DDR=1, these outputs provide DDR mode outputs; when SEL_DDR=0, these outputs provide standard SDRAM mode outputs. Voltage swing depends on VDD3.3_2.5. DDR[1:4]C_SDRA M [1,3,5,7] 7,11,16,20 O When SEL_DDR=1, these outputs provide complementary copies of BUF_IN; when SEL_DDR=0, these outputs provide standard SDRAM mode outputs. Voltage swing depends on VDD3.3_2.5. VDD3.3_2.5 2,8,12,17,23 P When VDD=2.5V, SEL_DDR=1. DDR-ONLY mode is selected; when VDD=3.3V, SEL_DDR=0. STANDARD SDRAM mode is selected. VDD2.5 32,37,41,47 P 2.5V power supply. GND 3,9,14,18,26, 31,35,40,46 P Ground. 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 11/07/00 Page 2 PLL103-02 DDR SDRAM Buffer for Desktop PCs with 4 DDR DIMMS Address Assignment Receiver/Transmitter Data Transfer Rate A6 A5 A4 A3 A2 A1 A0 R/W 1 0 1 0 0 1 _ Provides both slave write and Standard mode at 100kbits/s This serial protocol is designed to allow both blocks write and read from the controller. The bytes must be accessed in sequential order from lowest to highest byte. Each byte transferred terminate the transfer. The write or read block both begins with the master sending a slave address and a write condition (0xD2) or a read condition (0xD3). Following the acknowledge of this address byte, in Write Mode: the Command Byte and Byte Count Byte must be sent by the master but ignored by the slave, in Read Mode: the Byte Count Byte will be read by the master then all other Data Byte. Byte Count Byte default at power-up is = (0x09). I2C CONTROL REGISTERS 1. BYTE 6: Outputs Register (1=Enable, 0=Disable) Bit Pin# Default Description Bit 7 48 1 SEL_DDR ( I2C is ready only, value is set through pin48 ) Bit 6 - 0 Enhanced SDRAM Drive. 1 = Enhanced 25% Bit 5 - 0 Enhanced DDR Drive. 1 = Enhanced 25% Bit 4 - 0 Reserved Bit 3 45, 44 1 DDR11T, DDR11C Bit 2 43, 42 1 DDR10T, DDR10C Bit 1 39, 38 1 DDR9T, DDR9C Bit 0 34, 33 1 DDR8T, DDR8C 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 11/07/00 Page 3 PLL103-02 DDR SDRAM Buffer for Desktop PCs with 4 DDR DIMMS 2. BYTE 7: Outputs Register (1=Enable, 0=Disable) Bit Pin# Default Description Bit 7 30, 29 1 DDR7T, DDR7C Bit 6 28, 27 1 DDR6T, DDR6C Bit 5 21, 22 1 DDR5T, DDR5C Bit 4 19, 20 1 DDR4T_SDRAM6, DDR4C_SDRAM7 Bit 3 15, 16 1 DDR3T_SDRAM4, DDR3C_SDRAM5 Bit 2 10, 11 1 DDR2T_SDRAM2, DDR2C_SDRAM3 Bit 1 6, 7 1 DDR1T_SDRAM0, DDR1C_SDRAM1 Bit 0 4, 5 1 DDR0T, DDR0C 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 11/07/00 Page 4 PLL103-02 DDR SDRAM Buffer for Desktop PCs with 4 DDR DIMMS ELECTRICAL SPECIFICATIONS 1. Absolute Maximum Ratings PARAMETERS SYMBOL MIN. MAX. UNITS V DD V SS - 0.5 7.0 V Input Voltage, dc VI V SS - 0.5 V DD + 0.5 V Output Voltage, dc VO V SS - 0.5 V DD + 0.5 V Storage Temperature TS -65 150 °C Ambient Operating Temperature TA 0 70 °C 2 KV Supply Voltage ESD Voltage Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other conditions above the operational limits noted in this specification is not implied. 2. Operating Conditions PARAMETERS SYMBOL MIN. MAX. UNITS Supply Voltage V DD3.3 3.135 3.465 V Supply Voltage V DD2.5 2.375 2.625 V C IN 5 pF C OUT 6 pF Input Capacitance Output Capacitance 3. Electrical Specifications PARAMETERS SYMBOL CONDITIONS Input High Voltage V IH All Inputs except I2C Input Low Voltage V IL All inputs except I2C Input High Current I IH Input Low Current I IL MAX. UNITS 2.0 V DD +0.3 V V SS -0.3 0.8 V V IN = V DD TBM uA V IN = 0 TBM uA Output High Voltage V OH IOL = -12mA, Output Low Voltage V OL IOL = 12mA, Output High Current I OH VDD = 2.375V, VOUT=1V Output Low Current I OL VDD = 2.375V, VOUT=1.2V MIN. VDD = 2.375V TYP. 1.7 V VDD = 2.375V 0.6 -18 26 V -32 mA 35 mA Note: TBM: To be measured 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 11/07/00 Page 5 PLL103-02 DDR SDRAM Buffer for Desktop PCs with 4 DDR DIMMS 3. Electrical Specifications (Continued) PARAMETERS SYMBOL CONDITIONS MIN. TYP. MAX. UNITS Supply Current (DDR-only mode) I DD Unloaded outputs, 133MHz TBM mA Supply Current (SDRAM mode) I DD Unloaded outputs, 133MHz TBM mA Supply Current I DDS PD = 0 TBM mA Output Crossing Voltage V OC (VDD/2) -0.1 (VDD/2)+ 0.1 V Output Voltage Swing V OUT 1.1 VDD-0.4 V 55 % 170 MHz Duty Cycle DT Measured @ 1.5V 45 Max. Operating Frequency VDD/2 50 66 Rising Edge Rate T OR Measured @ 0.4V ~ 2.4V 1.0 1.5 2.0 V/ns Falling Edge Rate T OF Measured @ 2.4V ~ 0.4V 1.0 1.5 2.0 V/ns Clock Skew ( pin to pin ) T SKEW 100 ps Stabilization Time T ST 0.1 ms All outputs equally loaded Note: TBM: To be measured 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 11/07/00 Page 6 PLL103-02 DDR SDRAM Buffer for Desktop PCs with 4 DDR DIMMS PACKAGE INFORMATION 0.400 - 0.410 0.292 - 0.299 10.160 - 10.414 7.417 - 7.959 0.008 - 0.0135 0.025 0.203 - 0.343 0.835 0.015 (0.381) 0.010 - 0.016 (0.25 - 0.41) 0.620 - 0.630 (15.75 - 16.00) 0.088 - 0.096 (2.250 - 2.450) 45 0 0.097 - 0.104 (2.467 - 2.642) 30-6 0 0.050 MIN (1.346) 0.008 - 0.016 (0.20 - 0.41) 48PIN SSOP ORDERING INFORMATION For part ordering, please contact our Sales Department: 47745 Fremont Blvd., Fremont, CA 94538, USA Tel: (510) 492-0990 Fax: (510) 492-0991 PART NUMBER The order number for this device is a combination of the following: Device number, Package type and Operating temperature range PLL103-02 X C PART NUMBER TEMPERATURATURE C=COMMERCIAL M=MILITARY I=INDUSTRAL PACKAGE TYPE X=SSOP PhaseLink Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information furnished by PhaseLink is believed to be accurate and reliable. However, PhaseLink makes no guarantee or warranty concerning the accuracy of said information and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product. LIFE SUPPORT POLICY: PhaseLink’s products are not authorized for use as critical components in life support devices or systems without the express written approval of the President of PhaseLink Corporation. 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 11/07/00 Page 7