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CY28354OXC-400

Description
存储器,DDR 扇出缓冲器(分配) IC 400MHz 1 输出 48-SSOP
Categorysemiconductor    clock and timing   
File Size105KB,8 Pages
ManufacturerSilicon Labs
Websitehttps://www.silabs.com
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CY28354OXC-400 Overview

存储器,DDR 扇出缓冲器(分配) IC 400MHz 1 输出 48-SSOP

CY28354OXC-400 Parametric

Parameter NameAttribute value
category
MakerSilicon Labs
series-
PackagePipe fittings
\u96F6\u4EF6\u72B6\u6001\u505C\u4EA7
PLLnone
The main purposeMemory, DDR
enterclock
outputHCSL
Ratio - Input:Output2:12
Differential - Input:OutputNone/None
Frequency - maximum400MHz
Voltage - Power supply2.3V ~ 2.7V
Operating temperature0°C ~ 85°C
Installation typesurface mount type
Package/casing48-BSSOP (0.295", 7.50mm wide)
Supplier device packaging48-SSOP
Number of circuits1
Basic product numberCY28354
CY28354-400
210 MHz 24 Output Buffer for 4-DDR DIMMS for VIA Chipsets
Support
Features
• Supports VIA PRO 266, KT266 and P4x266
• Dual 1- to 12-output buffer/driver
• Supports up to four DDR DIMMs
• Low-skew outputs (< 75 ps)
• Supports 266-MHz, 333-MHz and 400-MHz DDR SDRAM
• SMBus Read and Write support
• Space-saving 48-pin SSOP package
Functional Description
The CY28354-400 is a 2.5V buffer designed to distribute
high-speed clocks in PC applications. The part has 24 outputs
to support four unbuffered DDR DIMMS. The CY28354-400
can be used in conjunction with CY28326 similar clock synthe-
sizer for the PTT880 and KTT880 chipsets.
The CY28354-400 also includes an SMBus interface which
can enable or disable each output clock. On power-up, all
output clocks are enabled.
Block Diagram
BUF_INA
FB_OUTA
DDRAT0
DDRAC0
DDRAT1
DDRAC1
DDRAT2
DDRAC2
DDRAT3
DDRAC3
DDRAT4
DDRAC4
DDRAT5
DDRAC5
DDRBT0
DDRBC0
DDRBT1
DDRBC1
DDRBT2
DDRBC2
DDRBT3
DDRBC3
DDRBT4
DDRBC4
DDRBT5
DDRBC5
FB_OUTB
Pin Configuration
SSOP
Top View
VDD2.5
GND
FB_OUTB
BUFF_INB
DDRBT0
DDRBC0
DDRBT1
DDRBC1
GND
VDD2.5
DDRAT0
DDRAC0
DDRAT1
DDRAC1
GND
VDD2.5
FB_OUTA
BUF_INA
DDRAT2
DDRAC2
DDRAT3
DDRAC3
VDD2.5
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
ADDR_SEL
SDATA
SMBus
Decoding
SCLOCK
I2C_CS
VDD2.5
GND
ADDR_SEL
I2C_CS
DDRBT2
DDRBC2
DDRBT3
DDRBC3
GND
VDD2.5
DDRAT4
DDRAC4
DDRAT5
DDRAC5
GND
VDD2.5
DDRBT4
DDRBC4
DDRBT5
DDRBC5
VDD2.5
GND
SDATA
SCLK
BUFF_INB
.......................... Document #: 38-07615 Rev. *B Page 1 of 8
400 West Cesar Chavez, Austin, TX 78701
1+(512) 416-8500
1+(512) 416-9669
www.silabs.com
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