Nine-Output 3.3V Buffer
CY2309NZ
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
, CA 95134
•
408-943-2600
Document #: 38-07182 Rev. *C
Revised February 24, 2004
Features
• One-input to nine-output buffer/driver
• Supports two DIMMs or four SO-DIMMs with one
additional output for feedback to an external or chipset
PLL
• Low power consumption for mobile applications
— Less than 32 mA at 66.6 MHz with unloaded outputs
• 8.7-ns Input-Output delay
• Buffers all frequencies from DC to 133.33 MHz
• Output-output skew less than 250 ps
• Multiple VDD and VSS pins for noise and electromag-
netic interference (EMI) reduction
• Space-saving 16-pin 150-mil SOIC package
• 3.3V operation
• Industrial temperature available
Functional Description
The CY2309NZ is a low-cost buffer designed to distribute
high-speed clocks in mobile PC systems and desktop PC
systems with SDRAM support. The part has nine outputs,
eight of which can be used to drive 2 DIMMs or 4 SO-DIMMs,
and the remaining can be used for external feedback to a PLL.
The device operates at 3.3V and outputs can run up to
133.33 MHz.
The CY2309NZ is designed for low EMI and power optimi-
zation. It has multiple VSS and VDD pins for noise optimization
and consumes less than 32 mA at 66.6 MHz, making it ideal
for the low-power requirements of mobile systems. It is
available in an ultra-compact 150-mil 16-pin SOIC package.
Block Diagram
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
BUF_IN
OUTPUT1
OUTPUT2
VDD
GND
OUTPUT3
OUTPUT4
VDD
OUTPUT9
OUTPUT8
OUTPUT7
VDD
GND
OUTPUT6
OUTPUT5
GND
16 SOIC
Top View
Pin Configuration
BUF_IN
OUTPUT2
OUTPUT3
OUTPUT4
OUTPUT5
OUTPUT6
OUTPUT7
OUTPUT8
OUTPUT9
OUTPUT1
Pin Description for CY2309NZ
Pin
Signal
Description
4, 8, 13
VDD
3.3V Digital Voltage Supply
5, 9, 12
GND
Ground
1
BUF_IN
Input Clock
2, 3, 6, 7, 10, 11,
14, 15, 16
OUTPUT [1:9]
Outputs
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