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CY2037_08 Datasheet, PDF (1/11 Pages) Cypress Semiconductor – High-Accuracy EPROM Programmable PLL Die for Crystal Oscillators | |||
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CY2037
High-Accuracy EPROM Programmable
PLL Die for Crystal Oscillators
Features
â EPROM-programmable die for in-package programming of
crystal oscillators
â High resolution PLL with 12-bit multiplier and 10-bit divider
â EPROM-programmable capacitor tuning array with shadow
register
â Twice programmable die (CY2037A, CY2037B[1], and
CY2037-2)
â Simple 2-wire programming interface
â On-chip oscillator runs from 10 - 30 MHz fundamental tuned
crystal
â EPROM-selectable TTL or CMOS duty cycle levels
â Operating frequency:
â 1 - 133 MHz at 5V
â 1 - 100 MHz at 3.3V
â 1 - 66.6 MHz at 2.7V
â Sixteen selectable post divide options, using PLL or reference
oscillator output
â Programmable power down (PD#) or OE pin (CY2037A,
CY2037B, and CY2037-2)
â Frequency select (CY2037-3)
â Programmable asynchronous or synchronous OE and power
down (PD#) modes (CY2037A, CY2037B, and CY2037-2)
â Low jitter outputs typically:
â < ± 100 ps (pk-pk) at 5V and f>33 MHz
â < ± 125 ps (pk-pk) at 3.3V and f>33 MHz
â 3.3V or 5V operation
â Small die
â Controlled rise and fall times and output slew rate
Benefits
â Enables quick turnaround of custom oscillators
â Lowers inventory costs through stocking of blank parts
â Enables synthesis of highly accurate and stable output clock
frequencies with zero or low PPM
â Enables fine-tuning of output clock frequency by adjusting
CLoad of the crystal
â Enables reprogramming of programmed part to correct errors,
and control excess inventory
â Enables programming of output frequency after packaging
â Lowers cost of oscillator because PLL may be programmed to
a high frequency using a low frequency, low cost crystal
â Duty cycle centered at 1.4V or VDD/2
â Provides flexibility to service most TTL or CMOS applications
â Provides flexibility in output configurations and testing
â Enables low power operations or output enable functions
â Enables two frequency options for meeting different industry
standards, that is, PAL/NTSC
â Provides flexibility for system applications through selectable
instantaneous or synchronous change in outputs
â Suitable for most PC, consumer, and networking applications
â Lowers inventory costs because the same die services both
applications
â Enables encapsulation in small size, surface mount packages
â Has lower EMI than oscillators
Table 1. Device Functionality: Output Frequencies
Parameter
Description
Fo
Output frequency
Condition
VDD = 4.5Vâ5.5V
VDD = 3.0Vâ3.6V
VDD = 2.7Vâ3.0V
Min
Max
Unit
1
133
MHz
1
100
MHz
1
66
MHz
Note
1. CY2037A and CY2037B are identical. However, CY2037B is recommended for all new designs.
Cypress Semiconductor Corporation ⢠198 Champion Court
Document Number: 38-07354 Rev. *E
⢠San Jose, CA 95134-1709 ⢠408-943-2600
Revised March 06, 2008
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