W234X
W234X Datasheet
W234
| Part | Datasheet |
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W234X |
W234X (pdf) |
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| W234 Dual Direct Rambus Clock Generator • Differential clock source for Direct Rambus memory subsystem for up to 1.6-Gb/s serial data transfer rate • Provide synchronization flexibility the Channel can optionally be synchronous to an external system or processor clock • Power managed output allows Rambus Channel clock to be turned off to minimize power consumption for mobile applications • Works with Cypress CY2210-2, CY2210-3, CY2215, W133, W158, W159, W161, and W167B to support architecture platforms • Low-power CMOS design packaged in a 28-pin, 173-mil TSSOP package Overview The Cypress W234 provides dual channel differential clock signals for a Direct Rambus memory subsystem. It includes signals to synchronize the Direct Rambus Channel clock to an external system clock but can also be used in systems that do not require synchronization of the Rambus clock. Key Specifications Supply Voltage VDD = 3.3V ± 0.165V Operating Temperature 0°C to +70°C Input Threshold 1.5V typical Maximum Input Voltage + 0.5V Maximum Input Frequency 100 MHz Output Duty Cycle 40/60% worst case Output Type:........................... Rambus signaling level RSL Block Diagram Pin Configuration PCLKM0 SYNCLKN0 Phase Alignment Output Logic REFCLK MULT0:2 S0:2 Test Logic CLK0 VDDIR CLK0# REFCLK SYNCLKN0 PCLKM0 SYNCLKN1 PCLKM1 VDDIPD STOP# PWR_DWN# CLK0# CLK0 CLK1 CLK1# MULT0 MULT1 MULT2 PCLKM1 SYNCLKN1 Phase Alignment Output Logic CLK1# Ordering Information Ordering Code W234 Package Name Package Type 28-pin TSSOP 173 mils W234 Max. 60 75 60 75 500 60 50 550 100 Unit ns ps V µA %tCYCLE ps Page 11 of 14 Layout Example W234 +3.3V Supply FB VDDIR G G VDDIPD µF 10 µF 1 2 3 4 7 8G 9 10 11 12 G25 G G 18 G Internal Power Supply Plane FB = Dale ILB1206 - 300 100 MHz G = VIA to GND plane layer All Bypass cap = Ceramic XR7 Page 12 of 14 Cypress Semiconductor Corporation, 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. Package Diagram 28-Pin Thin Small Shrink Outline Package TSSOP, 173 mils W234 Page 13 of 14 W234 Document Title W234 Dual Direct Rambus Clock Generator Document Number 38-07232 Issue ECN NO. Date Orig. of Change Description of Change 110497 10/21/01 SZV Change from Spec number 38-00921 to 38-07232 111647 02/07/02 IKA Changed Table 11, added Clock Output diagram, page 8 122846 12/21/02 RBI Add Power up Requirements to Operating Conditions Information Page 14 of 14 |
| More datasheets: 7512FPR-153 | 7512FPR-610 | 7512FPR-915 | B49410B2605Q000 | 50739181573600F | M244806 WH005 | M244806 WH001 | M244806 WH002 | 19028312A | 424/X1C9-1GKA |
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