CY2037
High Accuracy EPROM Programmable
PLL Die for Crystal Oscillators
2.7
Features
鈥?EPROM-programmable die for in-package program-
ming of crystal oscillators
Benefits
Enables quick turnaround of custom oscillators
Lowers inventory costs through stocking of blank parts
鈥?High resolution PLL with 12 bit multiplier and 10 bit di-
Enables synthesis of highly accurate and stable output clock
vider
frequencies with zero or low PPM
鈥?EPROM-programmable capacitor tuning array with
Shadow register
鈥?Twice programmable die (CY2037A and CY2037-2).
鈥?Simple 4-wire programming interface
鈥?On-chip oscillator runs from 10鈥?0 MHz fundamental
tuned crystal
鈥?EPROM-selectable TTL or CMOS duty cycle levels
鈥?Operating frequency
鈥?1鈥?33 MHz at 5V
鈥?1鈥?00 MHz at 3.3V
鈥?1鈥?6.6 MHz at 2.7V
鈥?Sixteen selectable post-divide options, using either
PLL or reference oscillator output
鈥?Programmable PWR_DWN or OE pin (CY2037A and
CY2037-2)
鈥?Frequency Select (CY2037-3)
鈥?Programmable asynchronous or synchronous OE and
PWR_DWN modes (CY2037 and CY2037-2)
鈥?Low Jitter outputs typically
鈥?< 鹵 100 ps (pk-pk) at 5V and f>33 MHz
鈥?< 鹵 125 ps (pk-pk) at 3.3V and f>33 MHz
鈥?3.3V or 5V operation
鈥?Small Die
鈥?Controlled rise and fall times and output slew rate
Enables fine-tuning of output clock frequency by adjusting
C
Load
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 V
DD
/2
Provides flexibility to service most TTL or CMOS applications
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 applications
Lowers inventory cost as same die services both applications
Enables encapsulation in small-size, surface mount packages
Has lower EMI than oscillators
Cypress Semiconductor Corporation
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134
鈥?/div>
408-943-2600
March 9, 2001
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