CY2SSTV16859 13-Bit to 26-Bit Registered Buffer PC2700-/PC3200-Compliant Features • Differential clock inputs up to 280 MHz • Supports LVTTL switching levels on the RESET# pin • Output drivers have controlled edge rates, so no external resistors are required. • Two KV ESD protection • Latch-up performance exceeds 100 mA per JESD78, Class II • 64-pin TSSOP/JEDEC and 56-pin QFN package availability • JEDEC specification supported Description This 13-bit to 26-bit registered buffer is designed for 2.3V to 2.7 VDD operations. All inputs are compatible with the JEDEC Standard for SSTL-2, except the LVCMOS reset (RESET#) input. All outputs are SSTL_2, Class II compatible. The CY2SSTV16859 operates from a differential clock (CLK and CLK#) of frequency up to 280 MHz. Data are registered at crossing of CLK going high and CLK# going low. When RESET# is low, the differential input receivers are disabled, and undriven (floating) data and clock inputs are allowed. The LVCMOS RESET# input must always be held at a valid logic high or low level. To ensure defined outputs from the register before a stable clock has been supplied, RESET# must be held in the low state during power up. In the DDR DIMM application, RESET# is completely asynchronous with respect to CLK# and CLK. Therefore, no timing relationship can be guaranteed between the two. When entering reset, the register is cleared and the outputs are driven low quickly, relative to the time to disable the differential input receivers, thus ensuring no glitches on the output. However, when coming out of reset, the register becomes active quickly, relative to the time to enable the differential input receivers. Pin Configuration Block Diagram RESET # CLK CLK # D1 Q1A D VREF C Q1B R To 12 Other Channels 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 CY2SSTV16859 Q13A Q12A Q11A Q10A Q9A VDDQ GND Q8A Q7A Q6A Q5A Q4A Q3A Q2A GND Q1A Q13B VDDQ Q12B Q11B Q10B Q9B Q8B Q7B Q6B GND VDDQ Q5B Q4B Q3B Q2B Q1B 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 VDDQ GND D13 D12 VDD VDDQ GND D11 D10 D9 GND D8 D7 RESET # GND CLK # CLK VDDQ VDD VREF D6 GND D5 D4 D3 GND VDDQ VDD D2 D1 GND VDDQ 64 TSSOP Package Cypress Semiconductor Corporation Document #: 38-07463 Rev. *B • 3901 North First Street • San Jose, CA 95134 • 408-943-2600 Revised July 29, 2003 CY2SSTV16859 D11 VDDQ VDD D12 D13 GND VDDQ Q13A Q12A Q11A Q10A Q9A VDDQ Q8A Pin Configuration (continued) 6 37 GND Q1A 7 36 CLK# Q13B 8 35 CLK VDDQ Q12B 9 34 VDDQ 10 33 VDD Q11B 11 32 VREF Q10B 12 31 D6 Q9B 13 30 D5 Q8B 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 D4 D10 D8 D3 Q7B VDDQ Q2A VDD RESET# D2 38 D1 5 VDDQ Q3A Q1B D7 Q2B 39 Q3B 4 Q4B Q4A Q5B 2 3 D9 Q5A 41 40 Q6A Q6B 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 VDDQ 1 Q7A 56 QFN Package Pin Description Pin TSSOP Name Description QFN 51 38 RESET# Disable Clocking and Reset Latch 7,15,34,39,43,50,54,58,63 37,48 GND Ground 37,46,60 26,33,45 VDD Supply Voltage 6,18,27,33,38,47,59,64 9,17,23,27,34,44,49,55 VDDQ Supply Voltage, Quiet 45 32 VREF Reference Voltage for Data Inputs D(1:13) 16,14,13,12,11,10,9,8,5,4,3,2,1 7,6,5,4,3,2,1,56,54,53,52,51,50 QA(1:13) Data Outputs 32,31,30,29,28,25,24,23,22,21,20, 22,21,20,19,18,16,15,14,13,12 19,17 11,10,8 QB(1:13) Data Outputs 35,36,40,41,42,44,52,53,55,56,57, 24,25,28,29,30,31,39,40,41,42 61,62 43,46,47 D(1:13) 48,49 35,36 Table 1. Function Table Data Inputs CLK, CLK# Differential Clock Signals [1,2,3] INPUTS OUTPUT RESET# CLK CLK# D Q H ↑ ↓ L L H ↑ ↓ H H H L or H L or H X Q0 L X or floating X or floating X or floating L Notes: 1. H = High voltage level. 2. L = Low voltage level. 3. X = Don’t care. Document #: 38-07463 Rev. *B Page 2 of 8 CY2SSTV16859 Absolute Maximum Conditions[4,5] Parameter Description Condition Max. Unit –0.5 3.6 V –0.5 VDD + 0.5 V Storage Temperature –65° 150°C °C DC Output Current –50 50 mA VI<0 or VI>VSS –50 50 mA VO<0 or VO>VDD –50 50 mA –100 100 mA [6] Terminal Voltage with respect to VSS VTERM[7] Terminal Voltage with respect to VSS TSTG IOUT IIK Continuous Clamp Current IOK Continuous Clamp Current Idd ISS Continuous Current through each VDD, VDDQ or VSS VTERM Min. Recommended Operating Conditions[8] Parameter VDD VDDQ Description Min. Typ. Max. Unit 2.3 2.5 2.7 V 2.3 2.5 2.7 V 2.5 2.6 2.7 V PC1600,PC2100,PC2700 1.15 1.25 1.35 V PC3200 1.25 1.3 1.35 V VREF – 40 mV VREF VREF + 40 mV V 0 – VDD V Supply voltage Output supply voltage PC1600,PC2100,PC2700 PC3200 VREF VTT Reference voltage (VREF = VDDQ/2) Termination voltage VI Input voltage VIH AC Data Input high-level voltage VREF + 310 mV – – V VIL AC Data Input low-level voltage – – VREF – 310 mV V VIH DC Data Input high-level voltage VREF + 150 mV – – V VIL DC Data Input low-level voltage – – VREF – 150 mV V VIH RESET# Input high-level voltage 1.7 – – V VIL RESET# Input low-level voltage – – 0.7 V VICR CLK, CLK# Common-mode input voltage range 0.97 – 1.53 V VI(PP) CLK, CLK# Peak-to-peak input voltage 360 – – mV IOH High-level output current – – –20 mA IOL Low-level output current – – 20 mA TA Operating free-air temperature 0 – 85 °C DC Electrical Specifications Parameter Description Condition Min. Typ.[9] Max. Unit 2.3V – – –1.2 V VIK Clamp Voltage VOH High level output IOH = –100 µA voltage IOH = –16 mA 2.3 to 2.7V VDD – 0.2 – – V 2.3V 1.95 – – V Low level output IOL = 100 µA voltage IOL = 16 mA 2.3 to 2.7V – – 0.2 V 2.3 – – 0.35 V VOL II = –18 mA VDD II All Inputs VI = VDD or VSS IDD Static Standby RESET# = VSS IO = 0 2.7V – – ±5 µA 2.7V – – 10 µA Static Operating RESET# = VDD, VI = VIH(AC) or VIL(AC) 2.7 – – 40.0 mA Notes: 4. The voltage on any input or I/O pin cannot exceed the power pin during power-up. Power supply sequencing is NOT required. 5. Stresses greater than those listed under Absolute Maximum Conditions may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended period may affect reliability. 6. VDD/VDDQ terminals. 7. All terminals except VDD. 8. The RESET# input of the device must be held at VDD or VSS to ensure proper device operation. 9. All typical values are measured at TAMB = 25°C Document #: 38-07463 Rev. *B Page 3 of 8 CY2SSTV16859 DC Electrical Specifications (continued) Parameter IDDD Description Condition Dynamic RESET# = VDD, VI = VIH(AC) or VIL(AC), IO = 0 operating – clock CLK and CLK# switching 50% duty cycle only VDD Min. Typ.[9] Max. Unit 2.7V – 30.0 – µA/ clock MHz 2.7 – 15.0 – µA/ clock MHz /data input Ω Dynamic operating – per each data input RESET# = VDD, VI = VIH(AC) or VIL(AC), CLK and CLK# switching 50% duty cycle. One data input switching at half clock frequency, 50% duty cycles. rOH Output high IOH = –20 mA 2.3 to 2.7V 7 – 20 rOL Output low IOL = 20 mA 2.3 to 2.7V 7 – 20 Ω rO(∆) |rOH – rOL| each IO = 20 mA, TA = 25°C separate bit 2.5V – – 4 Ω Ci Data Inputs VI = VREF + 310 mV 2.5 2.5 – 3.5 pF CLK and CLK# VICR = 1.25V, VI(PP) = 360 mV 2.5 2.5 – 3.5 pF RESET# VI = VDD or VSS 2.5 2.5 – 3.5 pF AC Electrical Specifications VDD = 2.5V± 0.2V Parameter Description fclock Clock Frequency tw Pulse duration, CLK, CLK# high or low tact tinact tsu Set-up time, fast slew rate[10, 12] Max. Unit – 280 MHz 2.0 – ns Differential inputs active time (data inputs must be held low after RESET# is taken high). – 22 ns Differential inputs inactive time (data and clock inputs must be held at valid levels (not floating) after RESET# is taken low). – 22 ns Data before CLK↑, CLK#↓ 0.75 – ns 0.9 – ns Data after CLK ↑, CLK#↓ 0.75 – ns 0.9 – ns [11, 12] Set-up time, slow slew rate th Min. Hold time, fast slew rate[10, 12] Hold time, slow slew rate[11, 12] Table 2. Switching Characteristics Over Recommended Operating Conditions[13] Parameter From (Input) To (Output) fmax tPHL RESET# Q tPD CLK and CLK# Q VDD = 2.5V ± 0.2V Unit Min. Max. 280 – 5 ns 1.1 2.8 ns MHz Notes: 10. For data signal input slew rate ≥ 1 V/ns. 11. For data signal input slew rate ≥ V/ns and < 1V/ns. 12. CLK and CLK# signals input slew rates are ≥ 1 V/ns. 13. See test circuits and waveforms. TA = 0°C to +85°C. Document #: 38-07463 Rev. *B Page 4 of 8 CY2SSTV16859 Output Buffer Characteristics Table 3. Output Buffer Voltage vs. Current (V/I) Characteristics Pull-Down Pull-Up Voltage (V) Min. I(mA) Max. I(mA) Min. I(mA) Max. I(mA) 0 0 0 –55 –162 0.1 6 13 –55 –161 0.2 10 25 –54 –160 0.3 15 38 –54 –159 0.4 19 49 –54 –157 0.5 23 60 –54 –156 0.6 27 71 –53 –154 0.7 30 81 –53 –152 0.8 34 91 –53 –149 0.9 36 100 –52 –146 1.0 38 108 –52 –143 1.1 40 115 –52 –140 1.2 42 123 –51 –137 1.3 43 130 –50 –134 1.4 44 137 –48 –130 1.5 44 144 –46 –125 1.6 45 150 –44 –120 1.7 45 158 –40 –112 1.8 45 165 –38 –104 1.9 45 172 –35 –96 2.0 45 179 –31 –83 2.1 46 185 –28 –72 2.2 46 191 –23 –60 2.3 46 196 –19 –49 2.4 46 201 –15 –38 2.5 46 206 –10 –27 2.6 46 211 –5 –15 2.7 46 216 0 0 Table 4. Output Buffer Slew-Rate Characteristics dV/dt Min. Max. Rise 0.85 V/ns 15.9 V/ns Fall 1.00 V/ns 18.9 V/ns Document #: 38-07463 Rev. *B Page 5 of 8 CY2SSTV16859 Parameter Measurement Information[14] VDD = 2.5V ± 0.2V Timing Diagrams V TT* LVCMOS RESET# Input R L = 50 O h m F ro m O u tpu t U n de r T es t VIH V DD /2 VIL tPHL T es t P oin t Output C L = 30 pF Figure 1. Load Circuit[15] V OH VTT V OL Figure 4. Voltage Waveforms Propagation Delay Times V I(PP) V ICR Timing Input t su Data Input th tw V REF * V REF * V IH ** V IL*** Figure 2. Voltage Waveforms Set-up and Hold Times VI(PP) VICR Input Input V REF * LVCMOS RESET# Input IDD tPHL VTT Output VTT V IH ** V IL *** Figure 5. Voltage Waveforms Pulse Duration[18,19] VICR tPLH V REF * VDD/2 tinact VDD/2 tact 10% 90% VOH VOL Figure 3. Voltage Waveforms Propagation Delay Times[16, 17] VDD 0V IDDH IDDL Figure 6. Voltage Waveforms Enable and Disable Times Low- and High-level Enabling Ordering Information Part Number Package Type Product Flow CY2SSTV16859ZC 64-pin TSSOP Commercial, 0° to 70°C CY2SSTV16859ZCT 64-pin TSSOP– Tape and Reel Commercial, 0° to 70°C CY2SSTV16859ZI 64-pin TSSOP Industrial, –40° to 85°C CY2SSTV16859ZIT 64-pin TSSOP – Tape and Reel Industrial, –40° to 85°C CY2SSTV16859LFC 56-pin QFN Commercial, 0° to 70°C CY2SSTV16859LFCT 56-pin QFN – Tape and Reel Commercial, 0° to 70°C CY2SSTV16859LFI 56-pin QFN Industrial, –40° to 85°C CY2SSTV16859LFIT 56-pin QFN– Tape and Reel Industrial, –40° to 85°C Notes: 14. All input pulses are supplied by generators having the following characteristics: PRR < 10 MHz, ZO = 50-ohm output slew rate = 1 V/ns ±20% (unless otherwise specified). 15. CL includes probe and jig capacitance. 16. the outputs are measured one at a time with one transition per measurement. 17. *VTT = VREF = VDDQ/2. 18. **VIH = VREF + 350 mV (AC voltage levels). 19. ***VIL = VREF - 350 mV (AC voltage levels). Document #: 38-07463 Rev. *B Page 6 of 8 CY2SSTV16859 Package Drawing and Dimension 64-lead Thin Shrunk Small Outline Package (6 mm x 17 mm) Z64 51-85153-** 56-Lead QFN 8 x 8 MM LF56A 51-85144-*D All product and company names mentioned in this document are the trademarks of their respective holders. Document #: 38-07463 Rev. *B Page 7 of 8 © Cypress Semiconductor Corporation, 2003. 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. CY2SSTV16859 Document History Page Document Title:CY2SSTV16859 13-Bit to 26-Bit Registered Buffer PC2700-/PC3200-Compliant Document Number: 38-07463 REV. ECN No. Issue Date Orig. of Change ** 123052 04/14/03 RGL New Data Sheet *A 126277 04/21/02 KKV Added commercial information to ordering information table, was not added in previous rev ** Added to title “PC2700-/PC3200- Compliant“ *B 128326 07/30/03 RGL Added 56 QFN packages (Industrial and Commercial) in the device Document #: 38-07463 Rev. *B Description of Change Page 8 of 8