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CY2077FZI Datasheet

  • CY2077FZI

  • High-accuracy EPROM Programmable Single-PLL Clock Generator

  • 13頁

  • CYPRESS

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CY2077
High-accuracy EPROM Programmable
Single-PLL Clock Generator
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Features
High-accuracy PLL with 12-bit multiplier and 10-bit
divider
EPROM-programmability
3.3V or 5V operation
Operating frequency
鈥?390 kHz鈥?33 MHz at 5V
鈥?390 kHz鈥?00 MHz at 3.3V
Reference input from either a 10鈥?0 MHz fundamental
toned crystal or a 1鈥?5 MHz external clock
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
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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
EPROM-selectable TTL or CMOS duty-cycle levels
Duty cycle centered at 1.5V or V
DD
/2
Provides flexibility to service most TTL or CMOS applications
Sixteen selectable post-divide options, using either PLL
Provides flexibility in output configurations and testing
or reference oscillator/external clock
Programmable PWR_DWN or OE pin, with
Enables low-power operation or output enable function and
asynchronous or synchronous modes
flexibility for system applications, through selectable instanta-
neous or synchronous change in outputs
Low jitter outputs typically
Suitable for most PC, consumer, and networking applications
鈥?80 ps at 3.3V/5V
Controlled rise and fall times and output slew rate
Has lower EMI than oscillators
Available in both commercial and industrial
Suitable to fit most applications
temperature ranges
Factory-programmable device options
Easy customization and fast turnaround
Logic Block Diagram
Pin Configuration
PWR_DWN
or OE
Phase Detector
Crystal
Oscillator
Charge
Pump
Configuration
EPROM
V
DD
XTALOUT
XTALIN
PD/OE
8-pin
Top View
1
2
3
4
8
7
6
5
CLKOUT
V
SS
V
SS
V
SS
XTALOUT
[1]
XTALIN
or
external clock
Q
10 bits
VCO
P
12 bits
HIGH
ACCURACY
PLL
MUX
/ 1, 2, 4, 8, 16, 32, 64, 128
Note:
1. When using an external clock source, leave XTALOUT floating.
CLKOUT
Cypress Semiconductor Corporation
Document #: 38-07210 Rev. *B
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3901 North First Street
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San Jose
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CA 95134 鈥?408-943-2600
Revised December 07, 2002

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