CY2907SC datasheet(2/10 Pages) CYPRESS

2 / 10 page

CY2907

Document #: 38-07137 Rev. **

Page 2 of 10

Functional Description

The CY2907 is a general-purpose Clock Generator designed

for use in a wide variety of applications—from graphics to PC

peripherals to disk drives. It generates selectable system clock

frequencies from a single reference input (crystal or reference

clock). The CY2907 is configured with an EPROM array, much

like the other devices in the Cypress EPROM Programmable

Clock Family, making it easily customizable for any applica-

tion. Furthermore, the CY2907 is compatible with all indus-

try-standard 9107 and 9108 clock synthesizers.

CyClocks™ Software

CyClocks is an easy-to-use software application that allows

you to configure any one of the EPROM Programmable Clocks

offered by Cypress. You may specify the input frequency, PLL

and output frequencies, and different functional options.

Please note the output frequency ranges in this data sheet

when specifying them in CyClocks to ensure that you stay

within the limits. You can download a copy of CyClocks free on

the Cypress Semiconductor website at www.cypress.com.

Consider using the CY2081, CY2291, or CY2292 for applica-

tions that require unrelated and multiple output frequencies.

Consider using the CY2071A for applications that require

more than one output clock.

Cypress FTG Programmer

The Cypress Frequency Timing Generator (FTG) Program-

mers are portable programmers designed to custom program

our family of EPROM Field Programmable Clock Devices.

The FTG programmers connect to a PC serial port and allow

users of CyClocks software to quickly and easily program any

of the CY2291F, CY2292F, CY2071AF, and CY2907F devices.

The ordering code for the Cypress FTG Programmer is

CY3670.

Maximum Ratings

(Beyond which the useful life may be impaired. For user guide-

lines, not tested.)

Supply Voltage ................................................. –0.5 to +7.0V

Input Voltage ........................................... –0.5V to VDD+0.5V

Storage Temperature (Non-Condensing) ... –65°C to +150°C

Max. Soldering Temperature (10 sec) ...................... +260°C

Junction Temperature ............................................... +150°C

Static Discharge Voltage ........................................... >2000V

(per MIL-STD-883, Method 3015)

Pin Summary

Name

Pin Number

Description

14-Pin SOIC

8-Pin SOIC

Frequency Select (CLKA) (Internal pull-up resistor to VDD)

VSS

Ground

VSS

Ground

Power-Down (active LOW) (Internal pull-up resistor to VDD)

XTALIN[1]

Reference Crystal Input

XTALOUT[1, 2]

Reference Crystal Feedback

OER

REFCLK Output Enable (active HIGH) (Internal pull-up resistor to VDD)

OEA

CLKA Output Enable (active HIGH) (Internal pull-up resistor to VDD)

CLKA

Clock Output

VDD

Voltage Supply

REFCLK

Reference Clock Output (Default, can be driven by PLL if desired)

Frequency Select (CLKA) (Internal pull-up resistor to VDD)

Notes:

For best accuracy, use a parallel-resonant crystal, CLOAD ≈ 17 pF.

Float XTALOUT pin if XTALIN is driven by reference clock (as opposed to crystal).

CY2907SC Datasheet(PDF) 2 Page - Cypress Semiconductor

CY2907SC Datasheet(HTML) 2 Page - Cypress Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10

Datasheet Download

Link URL