DDR110-XXT7RL STMICROELECTRONICS | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 5
Technical content
DDR110-xxT7RL® May 2001 - Ed: 2 DOUBLE DATA RATE TERMINATION NETWORK WITH DISABLE SWITCH n 10 bits Termination Network. n Integrated Termination resistor (Rs) n Enable input TTL level compatible n Impedance matching ± 2% (A0-B0 / An-Bn) n Optimized Low Crosstalk for parallel Termination to Vtt. n Optimized Low propagation delay FEATURES AND BENEFITS 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 IPAD TM (Integrated Passive & Active devices) technology.
DESCRIPTION
ASD™ IPAD™ Computer DDR (double data rate) Termination Network used on. n Motherboard n Workstation n Server n Notebooks MAIN APPLICATION TSSOP24 Rs A0 B0 VSS VCC OE NC Rs A5 B5 Rs A2 B2 Rs A3 B3 Rs A1 B1 Rs A6 B6 Rs A7 B7 Rs A8 B8 Rs A9 B9 Rs A4 B4 GATE CONTROL 1 24
Symbol Parameter Test Conditions Value UnitMin. Typ. Max. VIN Input voltage DQ0/7, DM0, DQS0 OE LOW OE HIGH + 3.3 + 2.5 V VIH Output Enable (OE) HIGH voltage Guaranteed logic HIGH level 25 (1) V VIL Output Enable (OE) LOW voltage Guaranteed logic LOW level 0.8 V VCC Supply voltage 4.5 5 5.5 V VTT Termination voltage 1.25 V (1) Open collector output with 10k pull-up resistor to 5V is recommended for typical OE signal. RECOMMENDED OPERATING CONDITIONS (Tamb = 25°C) Symbol Parameter Test Conditions Value UnitTambient = 25°C Min. Typ. Max. VCC Supply voltage range - 0.5 5 7 V VIN Input voltage range DQ0/7, DM0, DQS0 - 0.5 7 V VTT Termination voltage - 0.5 7 V VOE Termination Enable Voltage range - 0.5 7 V IIN Continuous input current 30 mA VESD ESD ratings (input / output YOE) HBM MIL STD 883C 2k V TSTG Storage temperature - 65 150 °C ABSOLUTE MAXIMUM RATINGS (Tamb = 25°C) OE B0 - B9 Function High A0 - A9 Connect Termination Low Hi - Z Disconnect Termination FUNCTION TABLE
(North Bridge) DDR 184-pin DIMM slot DDR 184-pin DIMM slot SDR 168-pin DIMM slot SDR 168-pin DIMM slot Enable 10 bits 10 bits 10 bits VTT DDR 110 DDR 110 DDR 110 DDR 110 APPLICATION SCHEMATICS Symbol Parameter Test conditions Value UnitMin. Typ. Max. R ON Switch ON Resistance VTT = 1.25V, VIN = 0V,OE=+5 V DDR110-27 DDR110-56 Ω Ω I OFF INPUT Leakage current Switch OFF INPU T = + 3.3V, OE = 0V 1µ A C OFF OFF-state capacitance VIN = 0V, 1MHz, 30mVRMS , O E=0 V 6p F ELECTRICAL CHARACTERISTICS (Tamb = 25°C - Vcc = 5V) VCC GND OE DQ7 DQ6 DM0 DQ5 DQ4 DQ3 DQ2 DQS0 DQ1 DQ0 ENABLE HIGH OE ENABLE HIGH V IslandTT Decoupling Capacitor to GND Plane NC
Pin # Assignement for DDR Termination Pin # Assignement for DDR Termination
1 VSS = GND 24 VCC
2 A0 23 B0
3 A1 22 B1
4 A2 21 B2
5 A3 20 B3
6 A4 19 B4
7 A5 18 B5
8 A6 17 B6
9 A7 16 B7
10 A8 15 B8
11 A9 14 B9
12 Termination enable HIGH 13 Not Connected
27 , 56 Ω ΩΩ Package code T7: TSSOP24 Tape & Reel OTHER INFORMATION
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 ap- proval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics © 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 Type Marking Package Weight Base qty Delivery mode DDR110-27T7RL DDR110-27 TSSOP-24 0.088 g 2500 Tape & Reel DDR110-56T7RL DDR110-56 TSSOP-24 0.088 g 2500 Tape & Reel n Epoxy meets UL94 - V0 standard PACKAGE MECHANICAL DATA TSSOP-24 b e A1 AA2 E D c L k REF. DIMENSIONS Millimeters Inches A 1.200 0.047 A1 0.050 0.150 0.002 0.006 b 0.190 0.300 0.007 0.012 c 0.090 0.200 0.004 0.008 E 6.400 0.252 e 0.65 0.026 k 0 °8 ° 0 °8 ° L1 1.000 0.039 0.65mm 6.8mm 4.4mm 0.30mm 8.00mm FOOTPRINT