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CY2037 Datasheet(PDF) 1 Page - Cypress Semiconductor

Part No. CY2037
Description  High Accuracy EPROM Programmable PLL Die for Crystal Oscillators
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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CY2037 Datasheet(HTML) 1 Page - Cypress Semiconductor

   
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PRELIMINARY
High Accuracy EPROM Programmable
PLL Die for Crystal Oscillators
CY2037
Cypress Semiconductor Corporation
3901 North First Street
San Jose
CA 95134
408-943-2600
December 24, 1997
Features
Benefits
• EPROM-programmable die for in-package programming of
crystal oscillators
Enables quick turnaround of custom oscillators
Lowers inventory costs through stocking of blank parts
• High resolution PLL with 12 bit multiplier and 10 bit divider
Enables synthesis of highly accurate and stable output clock
frequencies with zero or low PPM
• EPROM-programmable capacitor tuning array
Enables fine-tuning of output clock frequency by adjusting
CLoad of the crystal
• Twice programmable die
Enables reprogramming of programmed part, to correct errors,
and control excess inventory
• Simple 4-wire programming interface
Enables programming of output frequency after packaging
• On-chip oscillator runs from 10–30 MHz crystal
Lowers cost of oscillator as PLL can be programmed to a high
frequency using a low-frequency, low-cost crystal
• EPROM-selectable TTL or CMOS duty cycle levels
Duty cycle centered at 1.5V or VDD/2
Provides flexibility to service most TTL or CMOS applications
• Operating frequency
— 1–200 MHz at 5V
— 1–100 MHz at 3.3V
— 1–66.67 MHz at 2.7V
Services most PC, networking, and consumer applications
• Sixteen selectable post-divide options, using either PLL or
reference oscillator output
Provides flexibility in output configurations and testing
• Programmable PWR_DWN or OE pin
Enables low-power operation or output enable function
• Programmable asynchronous or synchronous OE and
PWR_DWN modes
Provides flexibility for system applications, through selectable
instantaneous or synchronous change in outputs
• Low Jitter outputs
— < ±100ps (pk-pk) at 5V
— < ±125ps (pk-pk) at 3.3V
Suitable for most PC, consumer, and networking applications
• 3.3V or 5V operation
Lowers inventory cost as same die services both applications
• Small Die
Enables encapsulation in small-size, surface mount packages
• Controlled rise and fall times and output slew rate
Has lower EMI than oscillators
Die Configuration
CY2037 Logic Block Diagram
AVDD
Top View
VSS
VDD
XG
PWR_DWN
CLKOUT
AVSS
XG
PWR_DWN
XD
CONFIGURATION
XD
CRYSTAL
CLKOUT
/ 1, 2, 4, 8, 16, 32, 64, 128
XD
XD
N/C
OSCILLATOR
1
2
3
4
5
6
7
8
9
10
or OE
or OE
MUX
HIGH
ACCURACY
PLL
EPROM


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