INTEGRATED CIRCUITS PCK2001R 14.318 – 133 MHz I2C 1:6 clock buffer Product specification 2000 Jul 25 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R • Individual SDRAM clock output enable/disable via I2C • Multiple VDD, VSS pins for noise reduction • 3.3 V operation • ESD protection exceeds 2000 V per Standard 801.2 FEATURES • Typically used to support four registered SDRAM DIMMs • 16-pin SSOP package • See PCK2001 for 48-pin 1:18 buffer part • See PCK2001M for 28-pin 1:10 buffer part • Optimized for 33 MHz, 66 MHz, 100 MHz and 133 MHz operation • Part-to-part skew < 500 ps • 175 ps skew outputs typical DESCRIPTION The PCK2001R is a 1–6 fanout buffer used for 133/100 MHz CPU, 66/33 MHz PCI, 14.318 MHz REF, or 133/100/66 MHz SDRAM clock distribution. 6 outputs are typically used to support up to 4 registered SDRAM DIMMs commonly found in server applications. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS TYPICAL UNIT tPLH tPHL Propagation delay BUF_IN to BUF_OUTn VCC = 3.3 V, CL = 30 pF 2.5 2.5 ns tr Rise time VCC = 3.3 V, CL = 30 pF 1.0 ns tf Fall time VCC = 3.3 V, CL = 20 pF 700 ps Total supply current VCC = 3.465 V 50 µA ICC ORDERING INFORMATION PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER 16-Pin Plastic SSOP 0°C to +70°C PCK2001RDB SOT369-1 PIN CONFIGURATION PIN DESCRIPTION PIN NUMBER I/O TYPE SYMBOL FUNCTION 1, 3 Output BUF_OUT (0, 2) Buffered clock outputs 13, 15 Output BUF_OUT (11, 14) Buffered clock outputs 6, 11 Output BUF_OUT (7, 17) Buffered clock outputs VSSI2C 4 Input BUF_IN SCL 8 I/O SDA I2C serial data 9 Input SCL I2C serial clock 12, 16 Input VDD (5, 9) 3.3 V power supply 2, 14 Input VSS (0, 9) Ground 7 Input VDDI2C 3.3 V I2C power supply 10 Input VSSI2C I2C ground 1 16 VDD9 VSS0 2 15 BUF_OUT14 BUF_OUT2 3 14 VSS9 BUF_IN 4 13 BUF_OUT11 VSS 5 12 VDD5 BUF_OUT7 6 11 BUF_OUT17 VDDI2C 7 10 SDA 8 9 PCK2001R BUF_OUT0 TOP VIEW SA00542 Intel and Pentium are registered trademarks of Intel Corporation. I2C is a trademark of Philips Semiconductors Corporation. 2000 Jul 25 2 Buffered clock input 853-2210 24202 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R FUNCTION TABLE I2CEN BUF_IN BUF_OUTn L X L H H H H L L ABSOLUTE MAXIMUM RATINGS1, 2 In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to VSS (VSS = 0V). SYMBOL PARAMETER VDD DC 3.3V supply voltage IIK DC input diode current VI DC input voltage Note 2 DC output diode current VO > VDD or VO < 0 VO DC output voltage Note 2 VO ≥ 0 to VDD IO DC output source or sink current Storage temperature range PTOT Power dissipation per package plastic medium-shrink SO (SSOP) UNIT MIN MAX –0.5 +4.6 V –50 mA VI < 0 IOK Tstg LIMITS CONDITION –0.5 5.5 V ±50 mA –0.5 VCC + 0.5 V ±50 mA –65 +150 °C 850 mW For temperature range: 0 to +70°C above +55°C derate linearly with 11.3mW/K NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. RECOMMENDED OPERATING CONDITIONS SYMBOL PARAMETER VDD CL CONDITIONS LIMITS UNIT MIN MAX DC 3.3V supply voltage 3.135 3.465 V Capacitive load 20 30 pF V VI DC input voltage range 0 VDD VO DC output voltage range 0 VDD V Tamb Operating ambient temperature range in free air 0 +70 °C 2000 Jul 25 3 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R DC CHARACTERISTICS SYMBOL LIMITS TEST CONDITIONS PARAMETER VDD (V) VIH HIGH level input voltage 3.135 to 3.465 Tamb = 0°C to +70°C OTHER UNIT MIN MAX 2.0 VDD + 0.3 V V VIL LOW level input voltage 3.135 to 3.465 VSS – 0.3 0.8 VOH 3.3V output HIGH voltage 3.135 to 3.465 IOH = –1mA 3.1 – V VOL 3.3V output LOW voltage 3.135 to 3.465 IOL= 1mA – 50 mV IOH Output HIGH current 3.135 to 3.465 VOUT = 1.5V –70 –185 mA IOL Output LOW current 3.135 to 3.465 VOUT = 1.5V 65 160 mA ±II Input leakage current 3.465 –5 5 µA ICC Quiescent supply current 3.465 – 100 µA 2000 Jul 25 VI = VDD or GND 4 IO = 0 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R AC CHARACTERISTICS SYMBOL PARAMETER TP CLK period TH CLK HIGH time LIMITS Tamb = 0°C to +70°C TEST CONDITIONS 33MHz UNIT NOTES MIN TYP9 MAX 1, 6 29.9 30.0 30.2 2, 6, 8 12.3 14.3 16.3 ns TL CLK LOW time 3, 6, 8 12.1 14.1 16.1 TP CLK period 1, 6 14.9 15.0 15.2 TH CLK HIGH time 2, 6, 8 5.6 6.8 8.0 TL CLK LOW time 3, 6, 8 5.3 6.5 7.7 TP CLK period 1,6 9.9 10.01 10.2 TH CLK HIGH time 2, 6, 8 3.3 4.2 5.1 TL CLK LOW time 3, 6, 8 3.2 4.1 5.0 TP CLK period 1, 6 7.4 7.5 7.7 TH CLK HIGH time 2, 6, 8 2.6 3.1 3.6 TL CLK LOW time 3, 6, 8 2.2 2.7 3.2 TSDRISE Rise time 4, 6, 10 1.5 2.0 4.0 V/ns TSDFALL Fall time 4, 6, 11 1.5 2.5 4.0 V/ns TPLH Buffer LH propagation delay 6, 7 1.0 2.4 3.5 ns 6, 7 1.0 2.6 3.5 ns 5, 6, 7 45 50 55 % 150 250 ps 500 ps TPHL Buffer HL propagation delay DUTY CYCLE Output Duty Cycle TSKW Bus CLK skew TDDSKW Device to device skew 66MHz 100MHz 133MHz Measured at 1.5V 1, 6 ns ns ns NOTES: 1. Clock period and skew are measured on the rising edge at 1.5V. 2. TH is measured at 2.4V as shown in Figure 2. 3. TL is measured at 0.4V as shown in Figure 2. 4. TSDRISE and TSDFALL are measured as a transition through the threshold region VOL = 0.4V and VOH = 2.4V (1 mA) JEDEC specification. 5. Duty cycle should be tested with a 50/50% input. 6. Over MIN (20pF) to MAX (30pF) discrete load, process, voltage, and temperature. 7. Input edge rate for these tests must be faster than 1 V/ns. 8. Calculated at minimum edge rate (1.5ns) to guarantee 45/55% duty cycle at 1.5V. Pulsewidth is required to be wider at the faster edge to ensure duty cycle specification is met. 9. All typical values are at VCC = 3.3V and Tamb = 25°C. 10. Typical is measured with MAX (30pF) discrete load. 11. Typical is measured with MIN (20pF) discrete load. 2000 Jul 25 5 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R I2C CONSIDERATIONS I2C has been chosen as the serial bus interface to control the PCK2001R. I2C was chosen to support the JEDEC proposal JC-42.5 168 Pin Unbuffered SDRAM DIMM. All vendors are required to determine the legal issues associated with the manufacture of I2C devices. 1) Address assignment: The clock driver in this specification uses the single, 7-bit address shown below. All devices can use the address if only one master clock driver is used in a design. The address can be re-used for the CKBF device if no other conflicting I2C clock driver is used in the system. The following address was confirmed by Philips on 09/04/96. A6 A5 A4 A3 A2 A1 A0 R/W 1 1 0 1 0 0 1 0 NOTE: The R/W bit is used by the I2C controller as a data direction bit. A ‘zero’ indicates a transmission (WRITE) to the clock device. A ‘one’ indicates a request for data (READ) from the clock driver. Since the definition of the clock buffer only allows the controller to WRITE data; the R/W bit of the address will always be seen as ‘zero’. Optimal address decoding of this bit is left to the vendor. 2) Options: It is our understanding that metal mask options and other pinouts of this type of clock driver will be allowed to use the same address as the original CKBF device. I2C addresses are defined in terms of function (master clock driver) rather than form (pinout, and option). 3) Slave/Receiver: The clock driver is assumed to require only slave/receiver functionality. Slave/transmitter functionality is optional. 4) Data Transfer Rate: 100 kbits/s (standard mode) is the base functionality required. Fast mode (400 kbits/s) functionality is optional. 5) Logic Levels: I2C logic levels are based on a percentage of VDD for the controller and other devices on the bus. Assume all devices are based on a 3.3 Volt supply. 6) Data Byte Format: Byte format is 8 Bits as described in the following appendices. 7) Data Protocol: To simplify the clock I2C interface, the clock driver serial protocol was specified to use only block writes from the controller. The bytes must be accessed in sequential order from lowest to highest byte with the ability to stop after any complete byte has been transferred. Indexed bytes are not allowed. However, the SMBus controller has a more specific format than the generic I2C protocol. The clock driver must meet this protocol which is more rigorous than previously stated I2C protocol. Treat the description from the viewpoint of controller. The controller ‘‘writes” to the clock driver and if possible would ‘‘read” from the clock driver (the clock driver is a slave/receiver only and is incapable of this transaction.) ‘‘The block write begins with a slave address and a write condition. After the command code the host (controller) issues a byte count which describes how many more bytes will follow in the message. If the host had 20 bytes to send, the first byte would be the number 20 (14h), followed by the 20 bytes of data. The byte count may not be 0. A block write command is allowed to transfer a maximum of 32 data bytes.” 1 bit 7 bits 1 1 8 bits 1 Start bit Slave Address R/W Ack Command Code Ack Ack Data Byte 1 Ack Data Byte 2 Ack 1 bit 8 bits 1 8 bits 1 ... Byte Count = N Data Byte 2 Ack Stop 8 bits 1 1 SW00279 NOTE: The acknowledgement bit is returned by the slave/receiver (the clock driver). Consider the command code and the byte count bytes required as the first two bytes of any transfer. The command code is software programmable via the controller, but will be specified as 0000 0000 in the clock specification. The byte count byte is the number of additional bytes required to transfer, not counting the command code and byte count bytes. Additionally, the byte count byte is required to be a minimum of 1 byte and a maximum of 32 bytes to satisfy the above requirement. 2000 Jul 25 6 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R For example: Notes: Byte count byte MSB LSB 0000 0000 Not allowed. Must have at least one byte. 0000 0001 Data for functional and frequency select register (currently byte 0 in spec) 0000 0010 Reads first two bytes of data. (byte 0 then byte 1) 0000 0011 Reads first three bytes (byte 0, 1, 2 in order) 0000 0100 Reads first four bytes (byte 0, 1, 2, 3 in order) 0000 0101 Reads first five bytes (byte 0, 1, 2, 3, 4 in order) 0000 0110 Reads first six bytes (byte 0, 1, 2, 3, 4, 5 in order) 0000 0111 Reads first seven bytes (byte 0, 1, 2, 3, 4, 5, 6 in order) 0010 0000 Max byte count supported = 32 A transfer is considered valid after the acknowledge bit corresponding to the byte count is read by the controller. The serial controller interface can be simplified by discarding the information in both the command code and the byte count bytes and simply reading all the bytes that are sent to the clock driver after being addressed by the controller. It is expected that the controller will not provide more bytes than the clock driver can handle. A clock vendor may choose to discard any number of bytes that exceed the defined byte count. 8) Clock stretching: The clock device must not hold/stretch the SCLOCK or SDATA lines low for more than 10 ms. Clock stretching is discouraged and should only be used as a last resort. Stretching the clock/data lines for longer than this time puts the device in an error/time-out mode and may not be supported in all platforms. It is assumed that all data transfers can be completed as specified without the use of clock/data stretching. 9) General Call: It is assumed that the clock driver will not have to respond to the ‘‘general call.” 10) Electrical Characteristics: All electrical characteristics must meet the standard mode specifications found in section 15 of the I2C specification. a) Pull-Up Resistors: Any internal resistors pull-ups on the SDATA and SCLOCK inputs must be stated in the individual datasheet. The use of internal pull-ups on these pins of below 100 kΩ is discouraged. Assume that the board designer will use a single external pull-up resistor for each line and that these values are in the 5–6 kΩ range. Assume one I2C device per DIMM (serial presence detect), one I2C controller, one clock driver plus one/two more I2C devices on the platform for capacitive loading purposes. (b) Input Glitch Filters: Only fast mode I2C devices require input glitch filters to suppress bus noise. The clock driver is specified as a standard mode device and is not required to support this feature. 11) PWR DWN: If a clock driver is placed in PWR DWN mode, the SDATA and SCLK inputs must be 3-Stated and the device must retain all programming information. IDD current due to the I2C circuitry must be characterized and in the data sheet. For specific I2C information consult the Philips I2C Peripherals Data Handbook IC12 (1997). 2000 Jul 25 7 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R SERIAL CONFIGURATION MAP The serial bits will be read by the clock buffer in the following order: Byte 0 – Bits 7, 6, 5, 4, 3, 2, 1, 0 Byte 1 – Bits 7, 6, 5, 4, 3, 2, 1, 0 Byte 2 – Bits 7, 6, 5, 4, 3, 2, 1, 0 All unused register bits (Reserved and N/A) should be desined as “Don’t Care”. It is expected that the controller will force all of these bits to a “0” level. All register bits labeled “Initialize to 0” must be written to zero during intialization. Failure to do so may result in a higher than normal operating current. The controller will read back the last written value. Byte 0: Active/inactive register 1 = enable; 0 = disable PIN# NAME DESCRIPTION 7 6 BUF_OUT7 Active/Inactive 6 — — — 5 — — — 4 — — — 3 — — — 2 3 BUF_OUT2 Active/Inactive 1 — — — 0 1 BUF_OUT0 Active/Inactive BIT NOTE: 1. Inactive means outputs are held LOW and are disabled from switching. These outputs are designed to be configured at power-on and are not expected to be configured during the normal modes of operation. Byte 1: Active/inactive register 1 = enable; 0 = disable BIT PIN# NAME 7 — — DESCRIPTION — 6 15 BUF_OUT14 Active/Inactive 5 — — — 4 — — — 3 13 BUF_OUT11 Active/Inactive 2 — — — 1 — — — 0 — — — NOTE: 1. Inactive means outputs are held LOW and are disabled from switching. These outputs are designed to be configured at power-on and are not expected to be configured during the normal modes of operation. Byte 2: Active/inactive register BIT PIN# NAME DESCRIPTION 7 11 BUF_OUT17 Active/Inactive 6 — — — 5 — — — 4 — — — 3 — — — 2 — — — 1 — — — 0 — — — NOTE: 1. Inactive means outputs are held LOW and are disabled from switching. These outputs are designed to be configured at power-on and are not expected to be configured during the normal modes of operation. 2000 Jul 25 8 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R AC WAVEFORMS TEST CIRCUIT VM = 1.5 V VX = VOL + 0.3 V VY = VOH –0.3 V VOL and VOH are the typical output voltage drop that occur with the output load. VDD VI VDD BUF_IN INPUT VM VO PULSE GENERATOR VM D.U.T. RT tPLH CL 500Ω tPHL VM VM SW00719 BUF_OUT Figure 3. Load circuitry for switching times SW00246 Figure 1. Load circuitry for switching times. tp th DUTY CYCLE 2.4 1.5 0.4 tl tr tf SW00613 Figure 2. Buffer Output clock 2000 Jul 25 9 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R SSOP16: plastic shrink small outline package; 16 leads; body width 4.4 mm 2000 Jul 25 10 SOT369-1 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R NOTES 2000 Jul 25 11 Philips Semiconductors Product specification 14.318 – 133 MHz I2C 1:6 clock buffer PCK2001R Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. [1] Please consult the most recently issued datasheet before initiating or completing a design. Definitions Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Disclaimers Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Copyright Philips Electronics North America Corporation 2000 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 Date of release: 07-00 Document order number: 2000 Jul 25 12 9397 750 07352