W256H Cypress Semiconductor Corp, W256H Datasheet
W256H
Specifications of W256H
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W256H Summary of contents
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... PWR_DWN# SEL_DDR Note: 1. Internal 100K pull-up resistors present on inputs marked with *. Design should not rely solely on internal pull-up resistor to set I/O pins HIGH. Cypress Semiconductor Corporation Document #: 38-07256 Rev. *C Functional Description The W256 is a 3.3V/2.5V buffer designed to distribute high-speed clocks in PC applications. The part has 12 outputs. ...
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Pin Summary Name Pins SEL_DDR 28 SCLK 16 SDATA 15 BUF_IN 10 FBOUT 1 PWR_DWN# 2 DDR[0:5]T_SDRAM 3, 7, 12, 19, 23, 27 [0,2,4,6,8,10] DDR[0:5]C_SDRAM 4, 8, 13, 18, 22, 26 [1,3,5,7,9, 11] VDD3.3_2 14, 21, 25 GND ...
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Serial Configuration Map • The Serial bits will be read by the clock driver in the following order: Byte 0 — Bits Byte 1 — Bits ...
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Maximum Ratings Supply Voltage to Ground Potential ..................–0.5 to +7.0V DC Input Voltage (except BUF_IN) ............ –0. Storage Temperature .................................. –65°C to +150°C Static Discharge Voltage ............................................>2000V (per MIL-STD-883, Method 3015) [2] Operating Conditions Parameter V Supply Voltage ...
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Switching Characteristics Parameter Name – Operating Frequency ÷ t [4,5] – Duty Cycle = SDRAM Rising Edge Rate 3 t SDRAM Falling Edge Rate 4 t DDR Rising Edge Rate 3d t DDR Falling Edge ...
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Switching Waveforms (continued) SDRAM Buffer HH and LL Propagation Delay 1.5V INPUT 1.5V OUTPUT t 6 Figure 1 shows the differential clock directly terminated by a 120 Ω resistor Device Out Under Test Out Figure 1. Differential ...
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... Cermaic Caps C1 = 10–22 µ VIA to GND plane layer Note: Each supply plane or strip should have a ferrite bead and capacitors All bypass caps = 0.1 µF ceramic Ordering Information Ordering Code W256H W256HT Lead Free CYW256OXC CYW256OXCT Document #: 38-07256 Rev VDD 10 µF 0.005 µ ...
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... Document #: 38-07256 Rev. *C © Cypress Semiconductor Corporation, 2004. 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 product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress ...
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Document History Page Document Title: W256 12 Output Buffer for 2 DDR and 3 SRAM DIMMS Document Number: 38-07256 REV. ECN NO. Issue Date ** 110521 12/04/01 *A 112153 03/01/02 *B 122858 12/19/02 *C 258671 See ECN Document #: 38-07256 ...