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W83176R-732, W83178S, W83193AR-73

Table of contents:
Info of W83176R-732
Info of W83178S
Info of W83193AR-73

W83176R-732, W83178S, W83193AR-73 Selling Leads, Datasheet

MFG:WINBOND Package Cooled:SSOP28 D/C:0409+

W83176R-732, W83178S, W83193AR-73 Picture

W83176R-732, W83178S, W83193AR-73 Datasheet download

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Part Number: W83176R-732

MFG: WINBOND

Package Cooled: SSOP28

D/C: 0409+

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W83176R-732 General Description

The W83176R-732 is a 2.5V Zero-delay D.D.R. Clock buffer designed for SiS chipset. W83176R-732 can support 2 D.D.R. DRAM DIMMs.

The W83176R-732 provides I2C serial bus interface to program the registers to enable or disable each clock outputs.

The W83176R-732 accepts a reference clock as its input and runs on 2.5V supply.

W83176R-732 Maximum Ratings

Symbol	PARAMETER	RATING
V_dd , V_IN	Voltage on any pin with respect to GND	-0.5V to +7.0V
T_STG	Storage Temperature	-65° C to +150° C
T_B	Ambient Temperature	-55° C to +125° C
T_A	Operating Temperature	0°C to + 70°C

W83176R-732 Features

• Zero-delay clock outputs
• Feedback pins for synchronous
• Supports up to 2 D.D.R. DIMMs
• One pairs of additional outputs for feedback
• Low Skew outputs (< 100 pS)
• Supports 400 MHz D.D.R. SDRAM
• ²C 2-Wire serial interface and supports Byte or Block Date RW
• Packaged in 28-pin SSOP

W83176R-732 Connection Diagram

W83178S General Description

The W83178S is a 13 outputs SDRAM clock buffer for 3-DIMMs models incorporate with W83196S- 14 which is the clock synthesizer especially for the 100 MHz models such as Intel BX chipsets. (Refer the datasheet fo Winbond W83196S-14)

The W83178S receives the clock from chipset by the Buffer_In pin and provides almost zero-delay (less than 4 nS propagation delay) SDRAM buffer outputs for the 13 SDRAM clocks which are synchronous with the CPU clock outputs priovided by W83196S-14. The clock skew between any two clock outputs is less than 250 pS and the output buffer impedance is about 15 ohms.

The W83178S also provides I2C serial bus interface to program the registers to enable or disable each SDRAM clock outputs.

W83178S Maximum Ratings

PARAMETER	SYMBOL	RATING
Voltage on any pin with respect to GND	VDD, VIN	-0.5V to +7.0V
Storage Temperature	TSTG	-65° C to +150° C
Ambient Temperature	TB	-55° C to +125° C
Operating Temperature	TA	0° C to +70° C

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.

W83178S Features

· Supports Intel Pentium II CPUs for BX chipset
· 13 SDRAM clocks for 3-DIMMs
· Clock skew less than 250 pS
· Almost none delay Buffer-in controlling SDRAM clocks(<4 nS propagation delay)
· I2C 2-wire serial interface
· Programmable registers to enable/stop each output
· Incorporate with W83196S-14
· Packaged in 28-pin SOP

W83178S Connection Diagram

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