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| (R) DDR110-xxT7RL DOUBLE DATA RATE TERMINATION NETWORK WITH DISABLE SWITCH ASDTM IPADTM Computer MAIN APPLICATION DDR (double data rate) Termination Network used on. s Motherboard s Workstation s Server s Notebooks DESCRIPTION The DDR110 provides 10 bits resistor Network to be used for SDR/DDR (double data rate) SDRAM bus Termination. This device has a series resistors (Rs) to reduce signal reflection noise. This eliminates the need for external terminating resistors. The DDR Termination Nerwork is enabled with the output Enable pin (OE). When OE is HIGH Inputs are connected to Outputs (A connected to B). When OE is LOW every inputs are in High impedance state (Hi - Z). The DDR Termination Network is a bidirectional device when the internal switch is ON. When the switch is OFF, the device will block current in both directions. This device is made using ST IPADTM (Integrated Passive & Active devices) technology. FEATURES AND BENEFITS s s s s s 24 1 12 TSSOP24 1 VSS Rs A0 Rs A1 Rs A2 Rs A3 Rs A4 Rs A5 Rs A6 Rs A7 Rs A8 Rs A9 12 OE GATE CONTROL VCC 24 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 NC s 10 bits Termination Network. Integrated Termination resistor (Rs) Enable input TTL level compatible Impedance matching 2% (A0-B0 / An-Bn) Optimized Low Crosstalk for parallel Termination to Vtt. Optimized Low propagation delay May 2001 - Ed: 2 1/5 DDR110-xxT7RL FUNCTION TABLE OE High Low B0 - B9 A0 - A9 Hi - Z Function Connect Termination Disconnect Termination ABSOLUTE MAXIMUM RATINGS (Tamb = 25C) Value Symbol Parameter Test Conditions Tambient = 25C Min. VCC VIN VTT VOE IIN VESD TSTG Supply voltage range Input voltage range DQ0/7, DM0, DQS0 Termination voltage Termination Enable Voltage range Continuous input current ESD ratings (input / output YOE) Storage temperature HBM MIL STD 883C - 65 - 0.5 - 0.5 - 0.5 - 0.5 Typ. 5 Max. 7 7 7 7 30 2 150 V V V V mA kV C Unit RECOMMENDED OPERATING CONDITIONS (Tamb = 25C) Symbol VIN VIH VIL VCC VTT Parameter Input voltage DQ0/7, DM0, DQS0 Output Enable (OE) HIGH voltage Output Enable (OE) LOW voltage Supply voltage Termination voltage Test Conditions OE LOW OE HIGH Guaranteed logic HIGH level Guaranteed logic LOW level 4.5 5 1.25 Value Min. 0 0 2 5 (1) 0.8 5.5 Typ. Max. + 3.3 + 2.5 Unit V V V V V (1) Open collector output with 10k pull-up resistor to 5V is recommended for typical OE signal. 2/5 (R) DDR110-xxT7RL ELECTRICAL CHARACTERISTICS (Tamb = 25C - Vcc = 5V) Symbol RON Parameter Switch ON Resistance Test conditions VTT = 1.25V, VIN = 0V,OE = + 5V DDR110-27 DDR110-56 INPUT = + 3.3V, OE = 0V VIN = 0V, 1MHz, 30mVRMS, OE = 0V 6 Value Min. 22 45 Typ. 27 56 Max. 32 67 1 Unit A pF IOFF COFF INPUT Leakage current Switch OFF OFF-state capacitance APPLICATION SCHEMATICS 5V Enable VTT DDR 110 DDR 184-pin DIMM slot DDR 184-pin DIMM slot SDR 168-pin DIMM slot SDR 168-pin DIMM slot System Controller Chipset DDR Address 10 bits DDR 110 DDR Control (North Bridge) DDR Data / Strobe 10 bits DDR 110 10 bits DDR 110 OE VCC GND DQ7 DQ6 DM0 DQ5 DQ4 DQ3 DQ2 DQS0 DQ1 DQ0 OE NC VTT Island Decoupling Capacitor to GND Plane ENABLE HIGH HIGH (R) 3/5 DDR110-xxT7RL PIN ASSIGNEMENT Pin # 1 2 3 4 5 6 7 8 9 10 11 12 Assignement for DDR Termination VSS = GND A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 Termination enable HIGH Pin # 24 23 22 21 20 19 18 17 16 15 14 13 Assignement for DDR Termination VCC B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 Not Connected 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 OTHER INFORMATION DDR1 Double Data Rate Single switch 10-BIT Wide 10 - 27 T7 RL Tape & Reel Package code T7: TSSOP24 Rs value in 27, 56 4/5 (R) DDR110-xxT7RL PACKAGE MECHANICAL DATA TSSOP-24 DIMENSIONS REF. E1 A2 A b D e A1 L L1 Millimeters Min. Typ. Max. 1.200 0.050 0.190 0.090 6.400 0.65 0 1.000 8 0 0.150 0.002 0.300 0.007 0.200 0.004 Min. Inches Typ. Max. 0.047 0.006 0.012 0.008 0.252 0.026 8 0.039 A A1 c k A2 b c D 0.800 1.000 1.050 0.031 0.039 0.041 24 13 E 7.700 7.800 7.900 0.303 0.307 0.311 4.300 4.400 4.500 0.169 0.173 0.177 1 12 E E1 e k L L1 0.450 0.600 0.750 0.017 0.024 0.029 FOOTPRINT 0.65mm 0.30mm 6.8mm 4.4mm 8.00mm Type DDR110-27T7RL DDR110-56T7RL s Marking DDR110-27 DDR110-56 Package TSSOP-24 TSSOP-24 Weight 0.088 g 0.088 g Base qty 2500 2500 Delivery mode Tape & Reel Tape & Reel Epoxy meets UL94 - V0 standard Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2001 STMicroelectronics - Printed in Italy - All rights reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com (R) 5/5 |
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