CY24271 Cypress Semiconductor Corporation., CY24271 Datasheet - Page 2

• Manufacturer Part Number: CY24271
• Description: Rambus Xdr Clock Generator
• Manufacturer: Cypress Semiconductor Corporation.

Pinouts
Table 1. Pin Definition - 28 Pin TSSOP
Document Number: 001-00411 Rev. *B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin No.
REFCLKB
/BYPASS
REFCLK
CLK3B
CLK2B
CLK1B
CLK0B
VDDC
Name
VDDP
VSSP
VSSC
CLK3
CLK2
CLK1
CLK0
ISET
VDD
VDD
VDD
VSS
SCL
SDA
VSS
VSS
VSS
ID0
ID1
EN
PWR
PWR
PWR
PWR
PWR
GND
GND
GND
GND
GND
GND
IO
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
2.5V power supply for phased lock loop (PLL)
Ground
Set clock driver current (external resistor)
Ground
Reference clock input (connect to clock source)
Complement of reference clock (connect to clock source)
2.5V power supply for core
Ground
SMBus clock (connect to smbus)
SMBus data (connect to smbus)
Output Enable (CMOS signal)
Device ID (CMOS signal)
Device ID (CMOS signal)
REFCLK bypassing PLL (CMOS signal)
Power supply for outputs
Complement clock output
Clock output
Ground
Complement clock output
Clock output
Ground
Power supply for outputs
Complement clock output
Clock output
Ground
Complement clock output
Clock output
Power supply for outputs
Figure 1. Pin Diagram - 28 Pin TSSOP
R EFC LKB
/BY PASS
REFC LK
VD DP
VDD C
VSS P
V SSC
ISET
VSS
SC L
S DA
ID0
ID 1
EN
10
11
12
13
14
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CLK0B
VDD
CLK0
VSS
CLK1
CLK1B
VDD
V SS
CLK2
CLK2B
VSS
CLK3
CLK3B
VD D
Description
CY24271
Page 2 of 13
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