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CY2077ZC-XXX Datasheet

  • CY2077ZC-XXX

  • MISCELLANEOUS CLOCK GENERATOR|TSSOP|8PIN|PLASTIC

  • 293.68KB

  • 12頁

  • ETC

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CY2077
High Accuracy EPROM Programmable
Single-PLL Clock Generator
Features
鈥?High accuracy PLL with 12-bit multiplier and 10-bit
divider
鈥?EPROM-programmability
鈥?3.3V or 5V operation
鈥?Operating frequency
鈥?390 kHz鈥?33 MHz at 5V
鈥?390 kHz鈥?00 MHz at 3.3V
鈥?Reference input from either a 10-30 MHz fundamental
toned crystal or a 1-75 MHz external clock
鈥?EPROM-selectable TTL or CMOS duty cycle levels
Benefits
Enables synthesis of highly accurate and stable output clock
frequencies with zero PPM
Enables quick turnaround of custom frequencies
Supports industry standard design platforms
Services most PC, networking, and consumer applications
Lowers cost of oscillator as PLL can be programmed to a high
frequency using either a low-frequency, low-cost crystal, or an
existing system clock
Duty cycle centered at 1.5V or V
DD
/2
Provides flexibility to service most TTL or CMOS applications
鈥?Sixteen selectable post-divide options, using either PLL
Provides flexibility in output configurations and testing
or reference oscillator/external clock
鈥?Programmable PWR_DWN or OE pin, with asynchro-
nous or synchronous modes
鈥?Low Jitter outputs typically
鈥?80 ps at 3.3V/5V
鈥?Controlled rise and fall times and output slew rate
鈥?Factory-programmable device options
either
Enables low-power operation or output enable function and flex-
ibility for system applications, through selectable instantaneous
or synchronous change in outputs
Suitable for most PC, consumer, and networking applications
Has lower EMI than oscillators
Easy customization and fast turnaround.
鈥?Available in both commercial and industrial temperature
Suitable to fit most applications
CY2077 Logic Block Diagram
PWR_DWN
or OE
Pin Configuration
Phase Detector
XTALOUT
[1]
CRYSTAL
OSCILLATOR
Charge
Pump
CONFIGURATION
EPROM
8-Pin
Top View
VDD
XTALOUT
XTALIN
PD/OE
1
2
3
4
8
7
6
5
CLKOUT
VSS
VSS
VSS
Q
10 bits
XTALIN
or
external clock
VCO
P
12 bits
HIGH
ACCURACY
PLL
MUX
Note 1. When using an external clock source leave
XTALOUT floating
/ 1, 2, 4, 8, 16, 32, 64, 128
CLKOUT
Cypress Semiconductor Corporation
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134
鈥?408-943-2600
January 24, 2001

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