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CY2037_07 Datasheet, PDF (1/10 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
Benefits
⢠EPROM-programmable die for in-package programming of
crystal oscillators
⢠High resolution PLL with 12-bit multiplier and 10-bit divider
⢠EPROM-programmable capacitor tuning array with Shadow
register
⢠Twice programmable die (CY2037A, CY2037B[1] and
CY2037-2).
⢠Simple 4-wire programming interface
⢠On-chip oscillator runs from 10â30 MHz fundamental tuned
crystal
⢠EPROM-selectable TTL or CMOS duty cycle levels
⢠Operating frequency
â 1â133 MHz at 5V
â 1â100 MHz at 3.3V
â 1â66.6 MHz at 2.7V
⢠Sixteen selectable post-divide options, using either PLL or
reference oscillator output
⢠Programmable power down (PD#) or OE pin (CY2037A,
CY2037B, and CY2037-2)
⢠Frequency Select (CY2037-3)
⢠Programmable asynchronous or synchronous OE and
power down (PD#) modes (CY2037A, CY2037B and
CY2037-2)
⢠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
⢠3.3V or 5V operation
⢠Small Die
⢠Controlled rise and fall times and output slew rate
⢠Enables quick turnaround of custom oscillators
⢠Lowers inventory costs through stocking of blank parts
⢠Enables synthesis of highly accurate and stable output clock
frequencies with zero or low PPM
⢠Enables fine-tuning of output clock frequency by adjusting
CLoad of the crystal
⢠Enables reprogramming of programmed part, to correct
errors, and control excess inventory
⢠Enables programming of output frequency after packaging
⢠Lowers cost of oscillator as PLL can be programmed to a
high frequency using a low-frequency, low-cost crystal
⢠Duty cycle centered at 1.4V or VDD/2
⢠Provides flexibility to service most TTL or CMOS applica-
tions
⢠Services most PC, networking, and consumer applications
⢠Provides flexibility in output configurations and testing
⢠Enables low-power operation or output enable function
⢠Enables two frequency options for meeting different industry
standards, i.e., PAL/NTSC
⢠Provides flexibility for system applications, through
selectable instantaneous or synchronous change in outputs
⢠Suitable for most PC, consumer, and networking applica-
tions
⢠Lowers inventory cost as same die services both applica-
tions
⢠Enables encapsulation in small-size, surface mount
packages
⢠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.
1
1
1
Max.
133
100
66
Unit
MHz
MHz
MHz
Note
1. The CY2037A and CY2037B are identical. However, the CY2037B is recommended for all new designs
Cypress Semiconductor Corporation
Document #: 38-07354 Rev. *D
⢠198 Champion Court ⢠San Jose, CA 95134-1709 ⢠408-943-2600
Revised February 26, 2007
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