ICS98ULPA877A Advance Information Integrated Circuit Systems, Inc. 1.8V Low-Power Wide-Range Frequency Clock Driver Recommended Application: • DDR2 Memory Modules / Zero Delay Board Fan Out • Provides complete DDR2 DIMM logic solution Pin Configuration 1 2 3 4 5 6 A B Product Description/Features: • Low skew, low jitter PLL clock driver • 1 to 10 differential clock distribution (SSTL_18) • Feedback pins for input to output synchronization • Spread Spectrum tolerant inputs • Auto PD when input signal is at a certain logic state E F G H J K 52-Ball BGA Top View CLKT6 CLKC6 VDDQ 31 CLKT5 34 32 CLKC5 35 5 CLKT5 GND GND OS VDDQ OE VDDQ GND GND CLKC9 33 CLKT0 VDDQ 36 CLKC0 OS AVDD LD or OE POWER DOWN AND LD, OS, or OE TEST MODE PLL BYPASS LOGIC LD 4 CLKC5 GND NB VDDQ NB NB VDDQ NB GND CLKT9 37 (1) OE 3 CLKC0 GND NB VDDQ NB NB VDDQ NB GND CLKT4 CLKT1 2 CLKT0 GND GND VDDQ VDDQ VDDQ VDDQ GND GND CLKC4 38 1 CLKT1 CLKC1 CLKC2 CLKT2 CLK_INT CLK_INC AGND AVDD CLKT3 CLKC3 CLKC1 A B C D E F G H J K 39 Block Diagram D 40 Switching Characteristics: • Period jitter: 40ps (DDR2-400/533) 30ps (DDR2-667/800) • Half-period jitter: 60ps (DDR2-400/533) 50ps (DDR2-667/800) • OUTPUT - OUTPUT skew: 40ps (DDR2-400/533) 30ps (DDR2-667/800) • CYCLE - CYCLE jitter 40ps C 6 CLKT6 CLKC6 CLKC7 CLKT7 FB_INT FB_INC FB_OUTC FB_OUTT CLKT8 CLKC8 CLKT0 CLKC0 CLKT1 CLKC7 CLKC1 VDDQ 1 30 CLKT2 CLKC2 2 29 CLKT7 CLKC2 CLKT2 3 28 VDDQ CLK_INT 4 27 FB_INT CLK_INC 5 26 FB_INC 6 25 FBOUTC AGND 7 24 FBOUTT AVDD 8 23 VDDQ VDDQ 9 22 OE GND 10 21 OS CLKT3 16 17 18 19 20 CLKC8 CLKT8 VDDQ CLKC7 CLKT9 FBIN_INC CLKC9 CLKT7 15 CLKC6 FBIN_INT VDDQ CLKT6 14 PLL CLKT4 10KΩ - 100KΩ CLKC4 CLKC5 13 CLK_INC VDDQ CLKC3 CLKT5 11 CLKC4 CLK_INT 12 CLKT4 CLKT3 CLKC3 CLKT8 CLKC8 CLKT9 CLKC9 NOTE: 1. The Logic Detect (LD) powers down the device when a logic LOW is applied to both CLK_INT and CLK_INC. FBOUTT 40-Pin MLF FBOUTC 1177C—05/23/07 ADVANCE INFORMATION documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals. ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners. ICS98ULPA877A Advance Information Pin Descriptions Te r m i n a l Name Electrical Characteristics Description AGND Analog Ground Ground AVDD A n a l o g p ow e r 1.8 V nominal CLK_INT Clock input with a (10K-100K Ohm) pulldown resistor Differential input CLK_INC Complentar y clock input with a (10K-100K Ohm) pulldown resistor Differential input FB_INT Feedback clock input Differential input FB_INC Complementary feedback clock input Differential input FB_OUTT Feedback clock output Differential output FB_OUTC Complementary feedback clock output Differential output OE Output Enable (Asynchronous) LVCMOS input OS Output Select (tied to GND or VDDQ) LVCMOS input GND Ground Ground VDDQ Logic and output power 1.8V nominal CLKT[0:9] Clock outputs Differential outputs CLKC[0:9] Complementary clock outputs Differential outputs NB No ball The PLL clock buffer, ICS98ULPA877A, is designed for a VDDQ of 1.8 V, a AVDD of 1.8 V and differential data input and output levels. Package options include a plastic 52-ball VFBGA and a 40-pin MLF. ICS98ULPA877A is a zero delay buffer that distributes a differential clock input pair (CLK_INT, CLK_INC) to ten differential pair of clock outputs (CLKT[0:9], CLKC[0:9]) and one differential pair feedback clock outputs (FB_OUTT, FBOUTC). The clock outputs are controlled by the input clocks (CLK_INT, CLK_INC), the feedback clocks (FB_INT, FB_INC), the LVCMOS program pins (OE, OS) and the Analog Power input (AVDD). When OE is low, the outputs (except FB_OUTT/FB_OUTC) are disabled while the internal PLL continues to maintain its locked-in frequency. OS (Output Select) is a program pin that must be tied to GND or VDDQ. When OS is high, OE will function as described above. When OS is low, OE has no effect on CLKT7/CLKC7 (they are free running in addition to FB_OUTT/FB_OUTC). When AVDD is grounded, the PLL is turned off and bypassed for test purposes. When both clock signals (CLK_INT, CLK_INC) are logic low, the device will enter a low power mode. An input logic detection circuit on the differential inputs, independent from the input buffers, will detect the logic low level and perform a low power state where all outputs, the feedback and the PLL are OFF. When the inputs transition from both being logic low to being differential signals, the PLL will be turned back on, the inputs and outputs will be enabled and the PLL will obtain phase lock between the feedback clock pair (FB_INT, FB_INC) and the input clock pair (CLK_INT, CLK_INC) within the specified stabilization time tSTAB. The PLL in ICS98ULPA877A clock driver uses the input clocks (CLK_INT, CLK_INC) and the feedback clocks (FB_INT, FB_INC) to provide high-performance, low-skew, low-jitter output differential clocks (CLKT[0:9], CLKC[0:9]). ICS98ULPA877A is also able to track Spread Spectrum Clocking (SSC) for reduced EMI. 1177C—05/23/07 2 ICS98ULPA877A Advance Information ICS98ULPA877A is available in Commercial Temperature Range (0°C to 70°C) and Industrial Temperature Range (-40°C to +85°C). See Ordering Information for details Function Table Inputs Outputs PLL AVDD OE OS CLK_INT CLK_INC CLKT CLKC FB_OUTT FB_OUTC GND H X L H L H L H Bypassed/Off GND H X H L H L H L Bypassed/Off GND L H L H *L(Z) *L(Z) L H Bypassed/Off GND L L H L *L(Z), CLKT7 active *L(Z), CLKC7 active H L Bypassed/Off 1.8V(nom) L H L H *L(Z) *L(Z) L H On 1.8V(nom) L L H L *L(Z), CLKT7 active *L(Z), CLKC7 active H L On 1.8V(nom) H X L H L H L H On 1.8V(nom) H X H L H L H L On 1.8V(nom) X X L L *L(Z) *L(Z) *L(Z) *L(Z) Off 1.8V(nom) X X H H Reser ved *L(Z) means the outputs are disabled to a low stated meeting the IODL limit. 1177C—05/23/07 3 ICS98ULPA877A Advance Information Absolute Maximum Ratings Supply Voltage (VDDQ & AVDD) . . . . . . . . . Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . Ambient Operating Temperature . . . . . . . . . . Storage Temperature . . . . . . . . . . . . . . . . . . . -0.5V to 2.5V GND - 0.5V to VDDQ + 0.5V -40°C to +85°C -65°C to +150°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. Electrical Characteristics - Input/Supply/Common Output Parameters Commercial: TA = 0°C - 70°C; Industrial: TA = -40°C - +85°C; Supply Voltage AVDDQ, VDDQ = 1.8 V +/- 0.1V (unless otherwise stated) SYMBOL MIN PARAMETER CONDITIONS Input High Current IIH VI = VDDQ or GND (CLK_INT, CLK_INC) Input Low Current (OE, IIL VI = VDDQ or GND OS, FB_INT, FB_INC) Output Disabled Low IODL OE = L, VODL = 100mV 100 Current CL = 0pf @ 410MHz IDD1.8 Operating Supply Current CL = 0pf IDDLD VIK VDDQ = 1.7V Iin = -18mA Input Clamp Voltage VDDQ - 0.2 IOH = -100 μA VOH High-level output voltage IOH = -9 mA 1.1 IOL=100 μA VOL Low-level output voltage IOL=9 mA VI = GND or VDDQ CIN 2 Input Capacitance1 1 COUT 2 VOUT = GND or VDDQ Output Capacitance 1 Guaranteed by design, not 100% tested in production. 1177C—05/23/07 4 TYP MAX UNITS ±250 µA ±10 µA µA 300 500 -1.2 1.45 0.25 0.10 0.6 3 3 mA µA V V V V V pF pF ICS98ULPA877A Advance Information Recommended Operating Condition (see note1) Commercial: TA = 0°C - 70°C; Industrial: TA = -40°C - +85°C; Supply Voltage AVDDQ, VDDQ = 1.8 V +/- 0.1V (unless otherwise stated) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage VDDQ, AVDD 1.7 1.8 1.9 V CLK_INT, CLK_INC, FB_INC, 0.35 x V DDQ V FB_INT Low level input voltage VIL OE, OS 0.35 x V DDQ V CLK_INT, CLK_INC, FB_INC, 0.65 x VDDQ V FB_INT High level input voltage VIH OE, OS 0.65 x VDDQ V DC input signal voltage VIN -0.3 VDDQ + 0.3 V (note 2) DC - CLK_INT, CLK_INC, 0.3 VDDQ + 0.4 V Differential input signal FB_INC, FB_INT VID voltage (note 3) AC - CLK_INT, CLK_INC, V 0.6 VDDQ + 0.4 FB_INC, FB_INT Output differential crossVOX VDDQ/2 - 0.10 V DDQ/2 + 0.10 V voltage (note 4) Input differential crossVDDQ/2 - 0.15 VDD/2 VDDQ2 + 0.15 V VIX voltage (note 4) High level output current I OH -9 mA 9 mA Low level output current I OL Operating free-air TA -40 85 °C temperature Notes: 1. Unused inputs must be held high or low to prevent them from floating. 2. DC input signal voltage specifies the allowable DC execution of differential input. 3. Differential inputs signal voltages specifies the differential voltage [VTR-VCP] required for switching, where VTR is the true input level and VCP is the complementary input level. 4. Differential cross-point voltage is expected to track variations of VDDQ and is the voltage at which the differential signal must be crossing. 1177C—05/23/07 5 ICS98ULPA877A Advance Information Timing Requirements Commercial: TA = 0°C - 70°C; Industrial: TA = -40°C - +85°C; Supply Voltage AVDDQ, VDDQ = 1.8 V +/- 0.1V (unless otherwise stated) CONDITIONS PARAMETER SYMBOL MIN MAX UNITS Max clock frequency freqop 1.8V+0.1V @ 25°C 95 410 MHz Application Frequency Range freqApp 1.8V+0.1V @ 25°C 160 410 MHz Input clock duty cycle dtin 40 60 % 15 µs CLK stabilization TSTAB NOTE: The PLL must be able to handle spread spectrum induced skew. NOTE: Operating clock frequency indicates a range over which the PLL must be able to lock, but in which it is not required to meet the other timing parameters. (Used for low speed system debug.) NOTE: Application clock frequency indicates a range over which the PLL must meet all timing parameters. NOTE: Stabilization time is the time required for the integrated PLL circuit to obtain phase lock of its feedback signal to its reference signal, within the value specificied by the Static Phase Offset (t∅), after power-up. During normal operation, the stabilization time is also the time required for the integrated PLL circuit to obtain phase lock of its feedback signal to its reference signal when CK and CK# go to a logic low state, enter the power-down mode and later return to active operation. CK and CK# may be left floating after they have been driven low for one complete clock cycle. 1177C—05/23/07 6 ICS98ULPA877A Advance Information Switching Characteristics 1 Commercial: TA = 0°C - 70°C; Industrial: TA = -40°C - +85°C; Supply Voltage AVDDQ, VDDQ = 1.8 V +/- 0.1V (unless otherwise stated) PARAMETER CONDITION SYMBOL ten Output enable time OE to any output tdis OE to any output Output disable time Period jitter tjit (per) Half-period jitter tjit(hper) Input slew rate SLr1(i) Output clock slew rate SLr1(o) Cycle-to-cycle period jitter tjit(cc+) tjit(cc-) Dynamic Phase Offset t(Ø)dyn Static Phase Offset t jit (per) + t (Ø)dyn + t skew(o) t(Ø)dyn + tskew(o) tSPO2 ∑(su) ∑t (h) Output to Output Skew (MHz) MIN 30.00 3 40 -40 50 20 50 80 60 40 30 33 UNITS ns ns ps ps ps ps v/ns v/ns v/ns ps ps ps ps ps ps ps ps ps kHz 0.00 -0.50 % 160 to 410 160 to 270 271 to 410 160 to 270 271 to 410 Input Clock Output Enable (OE), (OS) 160 to 410 160 to 270 271 to 410 271 to 410 -40 -30 -60 -50 1 0.5 1.5 0 0 -50 -20 -50 160 to 270 271 to 410 tskew SSC modulation frequency SSC clock input frequency deviation PLL Loop bandwidth (-3 dB from unity gain) 2.0 Notes: 1. Switching characteristics guaranteed for application frequency range. 2. Static phase offset shifted by design. 1177C—05/23/07 7 TYP 4.73 5.82 2.5 2.5 0 MAX 8 8 40 30 60 50 4 MHz ICS98ULPA877A Advance Information Parameter Measurement Information VDD ICS98ULPA877A V(CLK) V (CLK) GND Figure 1: IBIS Model Output Load VDD/2 GND C = 10pF ICS98ULPA877A R = 10Ω Z = 60Ω SCOPE Z = 50Ω L = 2.97" R = 1MΩ C = 1pF Z = 120Ω R = 10Ω Z = 60Ω Z = 50Ω VTT C = 10pF L = 2.97" R = 1MΩ C = 1pF VTT GND Note: VTT = GND VDD/2 Figure 2: Output Load Test Circuit Yx, FB_OUTC Yx, FB_OUTT tC(N + 1) tC(N) tJIT(CC) = tC(N) + tC(N + 1) Figure 3: Cycle-to-Cycle Jitter 1177C—05/23/07 8 ICS98ULPA877A Advance Information Parameter Measurement Information CLK_INC CLK_INT CLK_INC CLK_INT t(∅)n+1 t(∅)n n=N t(∅) = t(∅)n 1 N Figure 4: Static Phase Offset Yx# Yx Yx, FB_OUTC Yx, FB_OUTT tSKEW Figure 5: Output Skew Yx, FB_OUTC Yx, FB_OUTT tC(n) Yx, FB_OUTC Yx, FB_OUTT 1 fo t(JIT_PER) = tC(n) - 1 fo Figure 6: Period Jitter 1177C—05/23/07 9 ICS98ULPA877A Advance Information Parameter Measurement Information Yx, FB_OUTC Yx, FB_OUTT tJIT(HPER_n+1) tJIT(HPER_n) 1 fo tJIT(HPER) = tJIT(HPER_n) - 1 2xfo Figure 7: Half-Period Jitter 80% 80% V ID VOD 20% 20% Clock Inputs and outputs tSLR tSLF Figure 8: Input and Output Slew Rates 1177C—05/23/07 10 ICS98ULPA877A Advance Information CLK# CLK FBIN# FBIN t(∅) t(∅) SSC OFF SSC OFF SSC ON SSC ON t(∅)dyn t(∅)dyn t(∅)dyn t(∅)dyn Figure 9: Dynamic Phase Offset 50% VDDQ OE Y# tEN 50% VDDQ Y. Y# Y OE 50% VDDQ tDIS Y 50% VDDQ Y# Figure 10: Time Delay Between OE and Clock Output (Y, Y#) 1177C—05/23/07 11 ICS98ULPA877A Advance Information VIA CARD 1Ω BEAD 0603 AVDD VDDQ 4.7uF 1206 0.1uF 0603 2200pF 0603 PLL GND AGND VIA CARD Figure 11. AVDD Filtering *Place the 2200pF capacitors close to the PLL. *Use wide traces for PLL Analog power and GND. Connect PLL and caps to AGND trace and connect trace to one GND via (farthest from PLL). *Recommended bead: Fair-rite P/N 2506036017Y0 or equivalent (0.8Ω DC max., 600Ω at 100MHz). 1177C—05/23/07 12 ICS98ULPA877A Advance Information C SEATING PLANE Numeric Designations for Horizontal Grid A1 b REF T 4 3 2 1 A B C D Alpha Designations for Vertical Grid (Letters I, O, Q, and S not used) D d TYP D1 -e- TYP TOP VIEW E c REF -e- TYP h TYP E1 0.12 C ALL DIMENSIONS IN MILLIMETERS D E 7.00 Bsc 4.50 Bsc T Min/Max 0.86/1.00 e ----- BALL GRID ----HORIZ VERT 0.65 Bsc 6 10 Max. TOTAL 60 d Min/Max 0.25/0.45 h Min/Max 0.15/0.31 D1 E1 5.85 Bsc 3.25 Bsc Note: Ball grid total indicates maximum ball count for package. Lesser quantity may be used. * Source Ref.: JEDEC Publication 95, MO-205*, MO-225** 10-0055 Ordering Information ICS98ULPA877AHLF-T Example: ICS XXXX y H z LF- T Designation for tape and reel packaging Lead Free, RoHS Compliant (Optional) Temperature Grade Blank = 0°C to +70°C (Commercial) I = -40°C to +85°C (Industrial) Package Type H = BGA Revision Designator (will not correlate with datasheet revision) Device Type Prefix ICS = Standard Device 1177C—05/23/07 13 REF. DIMENSIONS b c 0.575 0.625 ** ICS98ULPA877A Advance Information Seating Plane A1 Index Area L A3 N (Ref.) ND & NE Even (ND - 1) x e (Ref.) (Typ.) If ND & NE are Even e/2 1 1 Anvil Singulation 2 2 or E (NE - 1) x e (Ref.) E2 Sawn Singulation E2/2 Top View b (Ref.) ND & NE Odd A D e C 0.08 D2/2 D2 C THERMALLY ENHANCED, VERY THIN, FINE PITCH QUAD FLAT / NO LEAD PLASTIC PACKAGE ALL DIMENSIONS IN MILLIMETERS N ND NE D x E BASIC D2 MIN. / MAX. E2 MIN. / MAX. L MIN. / MAX. 40 10 10 6.00 x 6.00 2.75 / 3.05 2.75 / 3.05 0.30 / 0.50 SYMBOL A A1 A3 b e MIN. MAX. 0.80 1.00 0 0.05 0.25 Reference 0.18 0.30 0.50 BASIC Source Reference: MLF2™ S 10-0053 Ordering Information ICS98ULPA877AKLF-T Example: ICS XXXX y K z LF- T Designation for tape and reel packaging Lead Free, RoHS Compliant (Optional) Temperature Grade Blank = 0°C to +70°C (Commercial) I = -40°C to +85°C (Industrial) Package Type K = MLF Revision Designator (will not correlate with datasheet revision) Device Type Prefix ICS = Standard Device 1177C—05/23/07 14 Thermal Base