CY2907 Cypress Semiconductor Corporation., CY2907 Datasheet - Page 2

• Manufacturer Part Number: CY2907
• Description: Single-pll General-purpose Eprom Programmable Clock Generator
• Manufacturer: Cypress Semiconductor Corporation.

Pin Summary
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.
Document #: 38-07137 Rev. **
S1
S2
S3
V
V
PD
XTALIN
XTALOUT
OER
OEA
CLKA
V
REFCLK
S0
Notes:
1.
2.
SS
SS
DD
For best accuracy, use a parallel-resonant crystal, C
Float XTALOUT pin if XTALIN is driven by reference clock (as opposed to crystal).
Name
[1]
[1, 2]
14-Pin SOIC
10
12
13
14
11
1
2
3
4
5
6
7
8
9
Pin Number
8-Pin SOIC
NA
NA
NA
NA
NA
NA
5
2
3
4
6
7
8
1
LOAD
17 pF.
Frequency Select (CLKA) (Internal pull-up resistor to V
Frequency Select (CLKA) (Internal pull-up resistor to V
Frequency Select (CLKA) (Internal pull-up resistor to V
Ground
Ground
Power-Down (active LOW) (Internal pull-up resistor to V
Reference Crystal Input
Reference Crystal Feedback
REFCLK Output Enable (active HIGH) (Internal pull-up resistor to V
CLKA Output Enable (active HIGH) (Internal pull-up resistor to V
Clock Output
Voltage Supply
Reference Clock Output (Default, can be driven by PLL if desired)
Frequency Select (CLKA) (Internal pull-up resistor to V
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 V
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)
Description
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CY2907
Page 2 of 10
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