CY29940AXC-1T

CY29940AXC-1T Datasheet

CY29940

Part	Datasheet
CY29940AXC-1T	CY29940AXC-1T (pdf)

Related Parts	Information
CY29940AI	CY29940AI
CY29940AXC-1	CY29940AXC-1

PDF Datasheet Preview
CY29940 2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer • 200-MHz clock support • LVPECL or LVCMOS/LVTTL clock input • LVCMOS/LVTTL compatible inputs • 18 clock outputs drive up to 36 clock lines • 60 ps typical output-to-output skew • Dual or single supply operation: 3.3V core and 3.3V outputs 3.3V core and 2.5V outputs 2.5V core and 2.5V outputs • Pin compatible with MPC940L, MPC9109 • Available in Commercial and Industrial temperature • 32-pin LQFP package The CY29940 is a low-voltage 200-MHz clock distribution buffer with the capability to select either a differential LVPECL or a LVCMOS/LVTTL compatible input clock. The two clock sources can be used to provide for a test clock as well as the primary system clock. All other control inputs are LVCMOS/LVTTL compatible. The eighteen outputs are 2.5V or 3.3V LVCMOS/LVTTL compatible and can drive series or parallel terminated transmission lines. For series terminated transmission lines, each output can drive one or two traces giving the device an effective fanout of Low output-to-output skews make the CY29940 an ideal clock distribution buffer for nested clock trees in the most demanding of synchronous systems. Block Diagram Pin Configuration 32 Q0 31 Q1 30 Q2 29 VDDC 28 Q3 27 Q4 26 Q5 25 VSS PECL_CLK PECL_CLK# TCLK TCLK_SEL VDDC 18 Q0-Q17 VSS TCLK TCLK_SEL PECL_CLK# VDD VDDC CY29940 21 20 Q6 Q7 Q8 VDD Q9 Q10 Q11 VSS VDDC 16 Q12 15 Q13 14 Q14 13 VSS 12 Q15 11 Q16 10 Pin Description[1] Name PECL_CLK PECL_CLK# TCLK 9, 10, 11, 13, 14, 15, 18, 19, 20, 22, 23, 24, 26, 27, 28, 30, 31, 32 Q 17:0 TCLK_SEL PWR VDDC 8, 16, 29 VDDC 7, 21 1, 2, 12, 17, 25 VSS Note PD = Internal Pull-Down, PU = Internal Pull-up I, PU PECL Input Clock Ordering Information Part Number CY29940AI CY29940AIT CY29940AC CY29940ACT Lead-free CY29940AXI CY29940AXIT CY29940AXC CY29940AXCT Package Type 32 Pin LQFP 32 Pin LQFP Tape and Reel 32 Pin LQFP 32 Pin LQFP Tape and Reel 32 Pin LQFP 32 Pin LQFP Tape and Reel 32 Pin LQFP 32 Pin LQFP Tape and Reel CY29940 Production Flow Industrial, to +85°C Industrial, to +85°C Commercial, 0°C to 70°C Commercial, 0°C to 70°C Industrial, to +85°C Industrial, to +85°C Commercial, 0°C to 70°C Commercial, 0°C to 70°C Page 5 of 7 Package Drawing and Dimensions 32-Lead Thin Plastic Quad Flatpack 7 x 7 x mm A32.14 CY29940 51-85088-*B All product and company names mentioned in this document may be the trademarks of their respective owners. Page 6 of 7 Cypress Semiconductor Corporation, The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. CY29940 Document History Page Document Title CY29940 2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer Document Number 38-07283 ECN NO. Issue Date Orig. of Change Description of Change 111094 02/01/02 BRK New data sheet 116776 08/15/02 HWT Incorporate results of final characterization using corporate methods, added output impedance on page 3 and added output duty cycle on page Add commercial temperature range in the ordering information on page 122875 12/21/02 RBI Add power up requirements to maximum rating information 448379 See ECN RGL Add typical value for output-to-output skew Add Lead-free devices Page 7 of 7

PDF Datasheet Preview

CY29940
2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer
• 200-MHz clock support
• LVPECL or LVCMOS/LVTTL clock input
• LVCMOS/LVTTL compatible inputs
• 18 clock outputs drive up to 36 clock lines
• 60 ps typical output-to-output skew
• Dual or single supply operation:
3.3V core and 3.3V outputs
3.3V core and 2.5V outputs
2.5V core and 2.5V outputs
• Pin compatible with MPC940L, MPC9109
• Available in Commercial and Industrial temperature
• 32-pin LQFP package

The CY29940 is a low-voltage 200-MHz clock distribution buffer with the capability to select either a differential LVPECL or a LVCMOS/LVTTL compatible input clock. The two clock sources can be used to provide for a test clock as well as the primary system clock. All other control inputs are LVCMOS/LVTTL compatible. The eighteen outputs are 2.5V or 3.3V LVCMOS/LVTTL compatible and can drive series or parallel terminated transmission lines. For series terminated transmission lines, each output can drive one or two traces giving the device an effective fanout of Low output-to-output skews make the CY29940 an ideal clock distribution buffer for nested clock trees in the most demanding of synchronous systems.

Block Diagram

Pin Configuration
32 Q0 31 Q1 30 Q2 29 VDDC 28 Q3 27 Q4 26 Q5 25 VSS

PECL_CLK

PECL_CLK#

TCLK

TCLK_SEL

VDDC 18 Q0-Q17

VSS TCLK TCLK_SEL PECL_CLK# VDD VDDC

CY29940
21 20

Q6 Q7 Q8 VDD Q9 Q10 Q11 VSS

VDDC 16

Q12 15

Q13 14

Q14 13

VSS 12

Q15 11

Q16 10

Pin Description[1]

Name

PECL_CLK

PECL_CLK#

TCLK
9, 10, 11, 13, 14, 15, 18, 19, 20, 22, 23, 24, 26, 27, 28, 30, 31, 32

Q 17:0

TCLK_SEL

PWR VDDC
8, 16, 29

VDDC
7, 21
1, 2, 12, 17, 25 VSS

Note PD = Internal Pull-Down, PU = Internal Pull-up

I, PU PECL Input Clock
Ordering Information

Part Number CY29940AI CY29940AIT CY29940AC CY29940ACT Lead-free CY29940AXI CY29940AXIT CY29940AXC CY29940AXCT

Package Type 32 Pin LQFP 32 Pin LQFP Tape and Reel 32 Pin LQFP 32 Pin LQFP Tape and Reel
32 Pin LQFP 32 Pin LQFP Tape and Reel 32 Pin LQFP 32 Pin LQFP Tape and Reel

CY29940

Production Flow Industrial, to +85°C Industrial, to +85°C Commercial, 0°C to 70°C Commercial, 0°C to 70°C

Industrial, to +85°C Industrial, to +85°C Commercial, 0°C to 70°C Commercial, 0°C to 70°C

Page 5 of 7

Package Drawing and Dimensions
32-Lead Thin Plastic Quad Flatpack 7 x 7 x mm A32.14

CY29940
51-85088-*B

All product and company names mentioned in this document may be the trademarks of their respective owners.

Page 6 of 7

Cypress Semiconductor Corporation, The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

CY29940

Document History Page

Document Title CY29940 2.5V or 3.3V, 200-MHz, 1:18 Clock Distribution Buffer Document Number 38-07283

ECN NO.

Issue Date

Orig. of Change

Description of Change
111094 02/01/02

BRK New data sheet
116776 08/15/02 HWT Incorporate results of final characterization using corporate methods, added
output impedance on page 3 and added output duty cycle on page
Add commercial temperature range in the ordering information on page
122875 12/21/02

RBI Add power up requirements to maximum rating information
448379 See ECN RGL Add typical value for output-to-output skew

Add Lead-free devices

Page 7 of 7

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived CY29940AXC-1T Datasheet file may be downloaded here without warranties.

Datasheet ID: CY29940AXC-1T 507743