W83176R-716
DDR BUFFER FOR SIS CHIPSET
W83176R-716
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
3
4
5
6
7
8
9
10
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.
Publication Release Date: April. 2001
- 1 - Revision 1.0
W83176R-716
1.0 GENERAL DESCRIPTION
The W83176R-716 is a 2.5V D.D.R. Clock buffer designed for SiS chipset. W83176R-716 can support
2 D.D.R. DRAM DIMMs. W83176R-716 can be incorporated with W83194BR-640/740 which is the
step-less clock with free programmable CPU/AGP/PCI freq. outputs.
The W83176R-716 provides I
2
C serial bus interface to program the registers to enable or disable each
clock outputs. The W83176R-716 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 2 D.D.R. DIMMs
One pairs of additional outputs for feedback
Low Skew outputs (< 100ps)
Supports 266MHz D.D.R. SDRAM
I
2
C 2-Wire serial interface and I
2
C read back
28-pin SSOP package
Publication Release Date: April. 2001
- 2 - Revision 1.0
W83176R-716
3.0 PIN CONFIGURATION
CLKC0 1
28 GND
CLKT0 2
27 CLKC5
VDD 3
26 CLKT5
CLKT1 4
25 CLKC4
CLKC1 5
24 CLKT4
GND 6
23 VDD
SDCLK 7
22 SDATA
Buffer_INT 8
21 NC
NC 9
20 FB_INT
VDDA 10
19 FB_OUTT
GND 11
18 NC
VDD 12
17 CLKT3
CLKT2 13
16 CLKC3
CLKC2 14
15 GND
4.0 PIN DESCRIPTION
IN - Input
OUT - Output
I/O - Bi-directional Pin
- Internal 120k
pull-up
Publication Release Date: April. 2001
- 3 - Revision 1.0
W83176R-716
4.1 Clock Outputs
SYMBOL PIN
I/O
FUNCTION
CLKC[5:0]
1,5,14,16,25,
27
OUT
Complementory Clocks of differential pair outputs
CLKT[5:0]
2,4,13,17,24,
26
OUT
True Clocks of differential pair outputs
SDATA
22
I/O
Serial data of I
2
C 2-wire control interface
SDCLK
7
IN
Serial clock of I
2
C 2-wire control interface
Buffer_INT 8
IN
True reference clock input
NC
9, 18, 20
IN
Not connected
FB_OUTT
19
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_INC
21 IN
Complementory Feedback input, provides feedback
signal to the internal PLL for synchronization with
CLK_INC to eliminate phase error.
4.2 Power Pins
SYMBOL PIN
FUNCTION
GND 6,11,15,28
Ground
VDD
3,12,23
Power Supply 2.5V
AVDD
10
Analog power supply, 2.5V
Publication Release Date: April. 2001
- 4 - Revision 1.0
W83176R-716
5.1 Register 0 : Control Register ( 1 = active, 0 = inactive )
Bit @PowerUp Pin
Description
7
1
1,2
CLKC0,CLKT0(Active / Inactive)
6
1
4,5
CLKC1,CLKT1(Active / Inactive)
5
1
13,14
CLKC2,CLKT2(Active / Inactive)
4
1
16,17
CLKC3,CLKT3(Active / Inactive)
3
1
24,25
CLKC4,CLKT4(Active / Inactive)
2
1
26,27
CLKC5,CLKT5(Active / Inactive)
1 1 -
Reserved
0 1 -
Reserved
5.2 Register 1: Reserved Register (default = 1)
Bit @PowerUp Pin
Description
7
1
-
Reserved (Skew Control ??)
6 1 -
Reserved
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
Publication Release Date: April. 2001
- 5 - Revision 1.0
W83176R-716
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
6.0 ORDERING INFORMATION
Part Number
Package Type
Production Flow
W83176R-716
28 PIN SSOP
Commercial, 0
C to +70C
7.0 HOW TO READ THE TOP MARKING
Publication Release Date: April. 2001
- 6 - Revision 1.0
W83176R-716
28051234
814GAB
1st line: Winbond logo and the type number: W83176R-716
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-716
8.0 PACKAGE DRAWING AND DIMENSIONS
28pin 209mil
1
2
D
E
e
Y
b
A1
A2 A
SEATING PLANE
DTEAIL A
L
L1
DETAIL A
SEATING PLANE
E
H
14
15
0
0.002
0.197
0.291
7.80
0
7.40
8
8.20
5.30
b
E
D
c
9.90
5.00
A1
A2
A
5.60
10.50
10.20
2.00
1.85
8
0.323
0.307
0.073
0.079
0.220
0.389
0.413
0.401
0.209
MIN.
DIMENSION IN INCH
SYMBOL
DIMENSION IN MM
MIN.
NOM
MAX.
MAX.
NOM
0.05
e
L
L1
Y
0.009
0.015
0.004
0.010
0.021 0.030
0.050
0.004
0.22
0.38
0.09
0.25
0.65
0.0256
0.55
0.75
1.25
0.10
H
E
0.95
0.037
1.75
1.65
0.065 0.069
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.
Publication Release Date: April. 2001
- 7 - Revision 1.0
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