CY29940AC-1 Cypress Semiconductor Corp, CY29940AC-1 Datasheet

CY29940AC-1

Manufacturer Part Number
CY29940AC-1
Description
Manufacturer
Cypress Semiconductor Corp
Type
Clock Driverr
Datasheet

Specifications of CY29940AC-1

Number Of Clock Inputs
2
Output Frequency
200MHz
Output Logic Level
LVCMOS/LVTTL
Operating Supply Voltage (min)
2.375V
Operating Supply Voltage (typ)
2.5/3.3V
Operating Supply Voltage (max)
3.465V
Package Type
TQFP
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Signal Type
LVCMOS/LVPECL/LVTTL
Mounting
Surface Mount
Pin Count
32
Quiescent Current
7mA
Lead Free Status / Rohs Status
Not Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CY29940AC-1
Manufacturer:
CY
Quantity:
2 147
Cypress Semiconductor Corporation
Document #: 38-07487 Rev. **
Features
• 200-MHz clock support
• LVPECL or LVCMOS/LVTTL clock input
• LVCMOS/LVTTL-compatible inputs
• 18 clock outputs: drive up to 36 clock lines
• 150 ps max. output-to-output skew
• 23 output impedance
• Dual or single supply operation:
• Pin-compatible with MPC940L, MPC9109
• Available in commercial and industrial temperature
• 32-pin TQFP package
Block Diagram
ranges
— 3.3V core and 3.3V outputs
— 3.3V core and 2.5V outputs
— 2.5V core and 2.5V outputs
PECL_CLK#
PECL_CLK
TCLK_SEL
TCLK
VDD
0
1
VDDC
18
3901 North First Street
Q0-Q17
Description
The CY29940-1 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
LVCMOS/LVTTL-compatible. The eighteen outputs are 2.5V
or 3.3V LVCMOS/LVTTL-compatible and can drive 50 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 1:36. Low
output-to-output skews make the CY29940-1 an ideal clock
distribution buffer for nested clock trees in the most
demanding of synchronous systems.
1:18 Clock Distribution Buffer
Pin Configuration
PECL_CLK#
PECL_CLK
TCLK_SEL
system
VDDC
TCLK
VDD
VSS
VSS
San Jose
2.5V or 3.3V, 200-MHz
clock.
4
5
6
7
8
1
2
3
32
9
CY29940-1
10
,
31
CA 95134
30
11
All
12
29
other
13
28
Revised January 28, 2003
14
27
15
26
control
16
25
21
20
19
24
23
22
18
17
CY29940-1
408-943-2600
inputs
Q6
Q7
Q8
VDD
Q9
Q10
Q11
VSS
are
[+] Feedback

Related parts for CY29940AC-1

CY29940AC-1 Summary of contents

Page 1

... Block Diagram VDD PECL_CLK 0 PECL_CLK# 1 TCLK TCLK_SEL Cypress Semiconductor Corporation Document #: 38-07487 Rev. ** 2.5V or 3.3V, 200-MHz 1:18 Clock Distribution Buffer Description The CY29940 low-voltage 200-MHz clock distribution buffer with the capability to select either a differential LVPECL LVCMOS/LVTTL-compatible input clock. The two clock ...

Page 2

Pin Description Pin Name PWR 5 PECL_CLK 6 PECL_CLK# 3 TCLK 9, 10, 11, 13, Q(17:0) VDDC 14, 15, 18, 19, 20, 22, 23, 24, 26, 27, 28, 30, 31 TCLK_SEL 8, 16, 29 VDDC 7, 21 ...

Page 3

Absolute Maximum Conditions Maximum Input Voltage Relative ............ V SS Maximum Input Voltage Relative ............. V DD Storage Temperature: ................................– 150 C Operating Temperature: ................................ – +85 C Maximum ...

Page 4

AC Electrical Specifications (V DD Parameter Description F Input Frequency max [4,5,10] T PECL_CLK to Q Delay PD </ =150 MHz [4,5,10] LVCMOS to Q Delay </ =150 MHz [4,5,6] FoutDC Output Duty Cycle [4,5] T Output-to-Output Skew skew [8] ...

Page 5

... LVCMOS_CLK Figure 4. LVCMOS Propagation Delay (TPD) Test Reference Ordering Information Part Number CY29940AC–1 32-pin TQFP CY29940AC–1T 32-pin TQFP – Tape and Reel CY29940AI–1 32-pin TQFP CY29940AI–1T 32-pin TQFP – Tape and Reel Document #: 38-07487 Rev CMR VCC ...

Page 6

... Document #: 38-07487 Rev. ** © Cypress Semiconductor Corporation, 2003. 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 Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor 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 ...

Page 7

Document History Page Document Title: CY29940-1 2.5V or 3.3V, 200-MHz 1:18 Clock Distribution Buffer Document Number: 38-07487 Issue REV. ECN NO. Date ** 119820 01/29/03 Document #: 38-07487 Rev. ** Orig. of Change Description of Change BRK New Data Sheet ...

Related keywords