W83176R-705
DDR BUFFER FOR SIS CHIPSET
Publication Release Date: April. 2002
W83176R-705
Data Sheet Revision History
Pages Dates Version Version
On Web
Main Contents
1 n.a. n.a. All of the versions before 0.50 are for internal use.
2 n.a. 02/Apr 1.0 1.0 Change version and version on web site to 1.0
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6
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Please note that all data and specifications are subject to change without notice. All the trademarks of
products and companies mentioned in this data sheet belong to their respective owners.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where
malfunction of these products can reasonably be expected to result in personal injury. Winbond
customers using or selling these products for use in such applications do so at their own risk and
agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
- 1 - Revision 1.0
W83176R-705
Publication Release Date: April. 2002
1.0 GENERAL DESCRIPTION
The W83176R-705 is a 2.5V Zero-delay D.D.R. Clock buffer designed for SiS chipset. W83176R-
705 can support 3 D.D.R. DRAM DIMMs. W83176R-705 can be incorporated with W83194BR-
640/740 which is the step-less clock with free programmable CPU/AGP/PCI freq. outputs.
The W83176R-705 provides I2C serial bus interface to program the registers to enable or disable each
clock outputs. The W83176R-705 accepts a pair reference clock as its input and runs on 2.5V supply.
2.0 PRODUCT FEATURES
• Zero-delay clock outputs
• Feedback pins for synchronous
• Supports up to 3 D.D.R. DIMMs
• One pairs of additional outputs for feedback
• Low Skew outputs (< 100ps)
• Supports 266MHz D.D.R. SDRAM
• I
2C 2-Wire serial interface and I2C read back
• 48-pin SSOP package
- 2 - Revision 1.0
W83176R-705
Publication Release Date: April. 2002
3.0 PIN CONFIGURATION
GND 1 48 GND
CLKC0 2 47 CLKC5
CLKT0 3 46 CLKT5
VDD 4 45 VDD
CLKT1 5 44 CLKT6
CLKC1 6 43 CLKC6
GND 7 42 GND
GND 8 41 GND
CLKC2 9 40 CLKC7
CLKT210 39CLKT7
VDD 11 38 VDD
SDCLK 12 37 SDATA
Buffer_INT 13 36 NC
NC 14 35 FB_INT
VDD 15 34 VDD
AVDD 16 33 FB_OUTT
AGND 17 32 NC
GND 18 31 GND
CLKC319 30CLKC8
CLKT320 29CLKT8
VDD 21 28 VDD
CLKT422 27CLKT9
CLKC423 26CLKC9
GND 24 25 GND
4.0 PIN DESCRIPTION
IN - Input
OUT - Output
I/O - Bi-directional Pin
- Internal 120kΩ pull-up
- 3 - Revision 1.0
W83176R-705
Publication Release Date: April. 2002
4.1 Clock Outputs
SYMBOL PIN I/O FUNCTION
CLKC[9:0] 26,30,40,43,47
,23,19,9,6,2
OUT Complementory Clocks of differential pair outputs
CLKT[9:0] 27,29,39,44,46
,22,20,10,5,3
OUT True Clocks of differential pair outputs
SDATA 37 I/O Serial data of I2C 2-wire control interface
SDCLK 12 IN Serial clock of I2C 2-wire control interface
Buffer_INT 13 IN True reference clock input
NC 14, 32,36 IN Not connected
FB_OUTT
33 OUT True Feedback output, dedicated for external
feedback. It switches at the same frequency as the
CLK. This output must be wired to FB_INT.
FB_INT
35 IN True Feedback input, provides feedback signal to the
internal PLL for synchronization with CLK_INT to
eliminate phase error.
4.2 Power Pins
SYMBOL PIN FUNCTION
GND 1,7,8,18,24,25,31,41,
42,48
Ground
VDD 4,11,21,28,34,38,45,
15
Power Supply 2.5V
AVDD 16 Analog power supply, 2.5V
AGND 17 Analog ground
- 4 - Revision 1.0
W83176R-705
Publication Release Date: April. 2002
5.1 Register 0 : Control Register ( 1 = active, 0 = inactive )
Bit @PowerUp Pin Description
7 1 2,3 CLKC0,CLKT0(Active / Inactive)
6 1 6,5 CLKC1,CLKT1(Active / Inactive)
5 1 9,10 CLKC2,CLKT2(Active / Inactive)
4 1 19,20 CLKC3,CLKT3(Active / Inactive)
3 1 23,22 CLKC4,CLKT4(Active / Inactive)
2 1 47,46 CLKC5,CLKT5(Active / Inactive)
1 1 43,44 CLKC6,CLKT6(Active / Inactive)
0 1 40,39 CLKC7,CLKT7(Active / Inactive)
5.2 Register 1: Control Register ( 1 = active, 0 = inactive )
Bit @PowerUp Pin Description
7 1 30,29 CLKC8,CLKT8(Active / Inactive)
6 1 26,27 CLKC9,CLKT9(Active / Inactive)
5 1 - Reserved
4 1 - Reserved
3 1 - Reserved
2 1 - Reserved
1 1 - Reserved
0 1 - Reserved
5.3 Register 2: Reserved Register (default =1 )
Bit @PowerUp Pin Description
7 1 - Reserved
6 1 - Reserved
5 1 - Reserved
4 1 - Reserved
3 1 - Reserved
2 1 - Reserved
1 1 - Reserved
0 1 - Reserved
- 5 - Revision 1.0
W83176R-705
Publication Release Date: April. 2002
5.4 Register 3: : Reserved Register (default =1 )
Bit @PowerUp Pin Description
7 1 - Reserved
6 1 - Reserved
5 1 - Reserved
4 1 - Reserved
3 1 - Reserved
2 1 - Reserved
1 1 - Reserved
0 1 - Reserved
- 6 - Revision 1.0
W83176R-705
Publication Release Date: April. 2002
6.0 ORDERING INFORMATION
Part Number Package Type Production Flow
W83176R-705 48 PIN SSOP Commercial, 0°C to +70°C
7.0 HOW TO READ THE TOP MARKING
- 7 - Revision 1.0
W83176R-705
28051234
814GAB
1st line: Winbond logo and the type number: W83176R-705
2nd line: Tracking code 2 8051234
2
: wafers manufactured in Winbond FAB 2
8051234: wafer production series lot number
3rd line: Tracking code 814 G B B
814: packages made in '98, week 14
G: assembly house ID; O means OSE, G means GR
A: Internal use code
B
: IC revision
All the trade marks of products and companies mentioned in this data sheet belong to their respective
owners.
W83176R-705
Publication Release Date: April. 2002
8.0 PACKAGE DRAWING AND DIMENSIONS
Headquarters
No. 4, Creation Rd. III
Science-Based Industrial Park
Hsinchu, Taiwan
TEL: 886-35-770066
FAX: 886-35-789467
www: http://www.winbond.com.tw/
Taipei Office
9F, No. 480, Rueiguang Road, Neihu District,
Taipei, 114, Taiwan
TEL: 886-2-81777168
FAX: 886-2-87153579
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II
123 Hoi Bun Rd., Kwun Tong
Kowloon, Hong Kong
TEL: 852-27516023-7
FAX: 852-27552064
Winbond Electronics
(North America) Corp.
2727 North First Street
San Jose, California 95134
TEL: 1-408-9436666
FAX: 1-408-9436668
Please note that all data and specifications are subject to change without notice. All the trade
marks of products and companies mentioned in this data sheet belong to their respective
owners.
These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal injury.
Winbond customers using or selling these products for use in such applications do so at their
own risk and agree to fully indemnify Winbond for any damages resulting from such improper
use or sale.
- 8 - Revision 1.0
