CY2081 Cypress Semiconductor Corporation., CY2081 Datasheet

no-image

CY2081

Manufacturer Part Number
CY2081
Description
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CY2081ASC-002
Manufacturer:
CY
Quantity:
4 189
Part Number:
CY2081ASI-001
Manufacturer:
CY
Quantity:
1 394
Part Number:
CY2081SC-106
Manufacturer:
CY
Quantity:
47 446
Part Number:
CY2081SC-106
Manufacturer:
CYP
Quantity:
20 000
Part Number:
CY2081SC-158
Manufacturer:
CYPRESS
Quantity:
20 000
Part Number:
CY2081SC-565
Manufacturer:
CY
Quantity:
2 292
Part Number:
CY2081SC-565
Manufacturer:
CYP
Quantity:
20 000
Part Number:
CY2081SC-565T
Manufacturer:
CYPR
Quantity:
4 443
Part Number:
CY2081SC-607
Manufacturer:
N/A
Quantity:
20 000
Part Number:
CY2081SC-657
Manufacturer:
CYPRESS
Quantity:
20 000
Part Number:
CY2081SL-112T
Manufacturer:
CYPRESS
Quantity:
5 000
Company:
Part Number:
CY2081SL-190T
Quantity:
1 292
Cypress Semiconductor Corporation
Document #: 38-07136 Rev. **
Features
Functional Description
The CY2081 is a general-purpose clock synthesizer designed
for use in applications such as modems, disk drives, CD-ROM
drives, Video CD players, games, set-top boxes and data/tele-
communications. This devices offers three configurable clock
outputs in an 8-pin 150-mil SOIC package and can be config-
• Factory-EPROM configurable for quick availability and
• General purpose clock synthesizer for all applications
• Three independent configurable clock outputs
• Outputs ranging from 500 kHz to 100 MHz (5V) and up
• Configurable output control pin (pin 8) can be used as
• Phase-locked loop oscillator input derived from exter-
• 3.3V or 5V operation (factory configured)
• 8-pin 150-mil packaging achieves minimum footprint
• Sophisticated internal loop filter requires no external
prototyping
– such as modems, disk drives, CD-ROM drives, Video
CD players, games, set-top boxes, data/telecommuni-
cations, etc.
to 80 MHz for 3.3V operation
an output enable, power-down, suspend or select line.
nal crystal (10 MHz to 25 MHz) or external reference
clock (1 MHz to 30 MHz)
for space-critical applications
components or manufacturing tweaks as commonly re-
quired with external filters
Logic Block Diagram
OE/PD/FS/SUSPEND
XTALOUT
XTALIN
Reference
Oscillator
EPROM-Programmable Clock Generator
3901 North First Street
PLL 1
PLL 2
PLL 3
ured to operate off either a 3.3V or 5V power supply. The
on-chip reference oscillator is designed for 10 MHz to 25 MHz
crystals. Alternatively, a reference clock between 1 MHz and
30 MHz can be used.
The CY2081 also features an output control pin (pin 8), which
can be configured as an output enable, power down, frequen-
cy select, or suspend input. This gives the user the ability to
three-state the output, power down the device, change the
CLKA output frequency during operation, or suspend any of
the outputs. Asserting the PD input will result in all the PLLs
and the outputs being shut down. The PLLs will have to re-lock
when the PD input is deasserted.
The CY2081 outputs three clocks: CLKA, CLKB, and CLKC,
whose frequencies can possess any value within the specified
range. Additionally, the reference frequency can be obtained
on any output. Custom configurations with user-defined fea-
tures and frequencies can be obtained by filling out the custom
configuration form located at the back of this data sheet and
contacting your local Cypress representative.
The CY2081 can replace multiple Metal Can Oscillators
(MCO) in a synchronous system, providing cost and board
space savings to manufacturers. Hence, this device is ideally
suited for applications that require multiple, accurate, and sta-
ble clocks synthesized from low-cost generators in small pack-
ages. A hard disk drive is an example of such an application.
In this case, CLKA drives the PLL in the Read Controller, while
CLKB and CLKC drive the MCU and associated sequencers.
Consider using the CY2291, CY2292, or CY2907 for applica-
tions that require more than three output clocks.
EPROM-
Configurable
Multiplexer
and Divide
Logic
Three-PLL General-Purpose
XTALOUT
San Jose
XTALIN
CLKA
Pin Configuration
GND
1
2
3
4
Top View
SOIC
CA 95134
CLKA
CLKC
CLKB
8
7
6
5
Revised September 26, 2001
OE/PD/FS/SUSPEND
V
CLKC
CLKB
DD
408-943-2600
CY2081

Related parts for CY2081

CY2081 Summary of contents

Page 1

... MHz to 25 MHz crystals. Alternatively, a reference clock between 1 MHz and 30 MHz can be used. The CY2081 also features an output control pin (pin 8), which can be configured as an output enable, power down, frequen- cy select, or suspend input. This gives the user the ability to ...

Page 2

... 4 [6] Except Crystal Pins [6] Except Crystal Pins – 0. 0.5V IN Three State Outputs max. 5V (3.3V) operation (15 pF) Power-down Active, 5V Operation =17 pF. L CY2081 Min. Max. 4.5 (3.0) 5.5 (3. (15) 10.0 25.0 1.0 30.0 Min. Typ. Max. 2.4 0.4 2.0 0.8 <100 150 <100 150 250 40 (24) 60 (40) L ...

Page 3

... Output clock stable time after power 2.4V 0. Min. Typ. Max. 10 2000 [100 MHz] [500 KHz] 12.5 2000 [80 MHz] [500 KHz] <0.5 1 <0.7 1 <400 500 <250 350 [11] t 40% 50% 60% 1 [11] t 45% 50 < 3.3V 0V CY2081 Unit MHz Page ...

Page 4

... DD 0.1 F OUTPUTS Customer Configuration Request Procedure The CY2081 is programmed at the wafer level, and is therefore only available as a factory programmed device. There is no field programming for the CY2081. For CY2081 programmed configurations, design opportunities must per year in production. If the design opportunity ...

Page 5

... The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. 8-Lead (150-Mil) SOIC S8 CY2081 51-85066-A Page ...

Page 6

... Document Title: CY2081 Three-PLL General Purpose EPROM-Programmable Clock Generator Document Number: 38-07136 Issue REV. ECN NO. Date ** 110245 10/28/01 Document #: 38-07136 Rev. ** Orig. of Change Description of Change SZV Change from Spec number: 38-00463 to 38-07136 CY2081 Page ...

Related keywords