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CY2318ANZ

18 Output, 3.3V SDRAM Buffer for Desktop PCs with 4 DIMMs

Cypress Semiconductor 

CY2318ANZ

Pin Summary

Name

Pins

Description

VDD

VSS

VDDIIC

VSSIIC

BUF_IN

OE

SDATA

SCLK

3, 7, 12, 16, 20, 29, 33, 37, 42, 46 3.3V Digital voltage supply

6, 10, 15, 19, 22, 27, 30, 34, 39, 43 Ground

23

Serial interface voltage supply

26

Ground for serial interface

11

Input clock (5V Tolerant)

38

Output Enable (active HIGH), Three-state outputs when low[1]

24

Serial data input[1]

25

Serial clock input[1]

SDRAM [0–3] 4, 5, 8, 9

SDRAM byte 0 clock outputs

SDRAM [4–7] 13, 14, 17, 18

SDRAM byte 1 clock outputs

SDRAM [8–11] 31, 32, 35, 36

SDRAM byte 2 clock outputs

SDRAM [12–15] 40, 41, 44, 45

SDRAM byte 3 clock outputs

SDRAM [16–17] 21, 28

SDRAM clock outputs usable for feedback

N/C

1, 2, 47, 48

Reserved for future modifications, do not connect in system

Note:

1. Internal pull-up resistor to VDD (value > 100 kohms)

Device Functionality

OE

SDRAM [0–17]

0

Hi-Z

1

1 x BUF_IN

Document #: 38-07181 Rev. *B

Page 2 of 9

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