cy23fp12 Cypress Semiconductor Corporation., cy23fp12 Datasheet

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cy23fp12

Manufacturer Part Number
cy23fp12
Description
200-mhz Field Programmable Zero Delay Buffer
Manufacturer
Cypress Semiconductor Corporation.
Datasheet

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Cypress Semiconductor Corporation
Document #: 38-07246 Rev. *E
Features
• Fully field-programmable
• 10-MHz to 200-MHz operating range
• Split 2.5V or 3.3V outputs
• Two LVCMOS reference inputs
• Twelve low-skew outputs
• 110 ps typ. cycle-cycle jitter (same freq)
• Three-stateable outputs
• < 50-µA shutdown current
• Spread Aware
• 28-pin SSOP
• 3.3V operation
• Industrial temperature available
— Input and output dividers
— Inverting/noninverting outputs
— Phase-locked loop (PLL) or fanout buffer configu-
— 35ps typ. output-to-output skew (same freq)
Block Diagram
VDDC
REFSEL
VSSC
ration
REF1
REF2
S[2:1]
FBK
Function
Selection
÷ M
÷ N
200-MHz Field Programmable Zero Delay Buffer
Lock Detect
400MHz
100 to
PLL
Test Logic
÷ X
÷ 1
÷ 2
÷ 3
÷ 4
3901 North First Street
Functional Description
The CY23FP12 is a high-performance fully field-program-
mable 200 MHz zero delay buffer designed for high speed
clock distribution. The integrated PLL is designed for low jitter
and optimized for noise rejection. These parameters are
critical for reference clock distribution in systems using
high-performance ASICs and microprocessors.
The CY23FP12 is fully programmable via volume or prototype
programmers enabling the user to define an appli-
cation-specific Zero Delay Buffer with customized input and
output dividers, feedback topology (internal/external), output
inversions, and output drive strengths. For additional flexibility,
the user can mix and match multiple functions, listed in
Table 2, and assign a particular function set to any one of the
four possible S1-S2 control bit combinations. This feature
allows for the implementation of four distinct personalities,
selectable with S1-S2 bits, on a single programmed silicon.
The CY23FP12 also features a proprietary auto-power-down
circuit that shuts down the device in case of a REF failure,
resulting in less than 50 µA of current draw.
The CY23FP12 provides twelve outputs grouped in two banks
with separate power supply pins which can be connected
independently to either a 2.5V or a 3.3V rail.
Selectable reference input is a fault tolerance feature which
allows for glitch-free switch over to secondary clock source
when REFSEL is asserted/deasserted.
VDDA
CLKA0
CLKA1
CLKA2
CLKA3
CLKA4
CLKA5
VSSA
VDDB
CLKB0
CLKB1
CLKB2
CLKB3
CLKB4
CLKB5
VSSB
San Jose
,
CA 95134
CLKB0
CLKB1
CLKB2
CLKB3
CLKB4
CLKB5
REF2
REF1
V
V
V
Pin Configuration
V
V
DDB
DDB
DDC
SSB
SSB
S2
Revised December 13, 2004
Top View
12
1
2
3
4
5
6
7
8
9
10
11
13
14
SSOP
CY23FP12
27
26
25
24
23
22
21
20
19
18
17
16
15
28
408-943-2600
REFSEL
FBK
CLKA0
CLKA1
V
CLKA2
CLKA3
V
V
CLKA5
V
V
S1
CLKA4
SSA
DDA
SSA
DDA
SSC
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cy23fp12 Summary of contents

Page 1

... These parameters are critical for reference clock distribution in systems using high-performance ASICs and microprocessors. The CY23FP12 is fully programmable via volume or prototype programmers enabling the user to define an appli- cation-specific Zero Delay Buffer with customized input and output dividers, feedback topology (internal/external), output inversions, and output drive strengths ...

Page 2

... Bank A. LVTTL Clock output, Bank A. LVTTL Clock output, Bank A. POWER Ground for Bank A. LVTTL Clock output, Bank A. LVTTL CLock output, Bank A. LVTTL PLL feedback input. LVTTL Reference select input. REFSEL = 0, REF1 is selected. REFSEL = 1, REF2 is selected. CY23FP12 Description Page [+] Feedback ...

Page 3

... CLKB2 and CLKB3 will become complimentary pairs. Document #: 38-07246 Rev. *E /1,/2,/3,/4, /x,/2x /1,/2,/3,/4, /x,/2x Output /1,/2,/3,/4, /x,/2x Function PLL Select /1,/2,/3,/4, /x,/2x Matrix /1,/2,/3,/4, /x,/2x /1,/2,/3,/4, /x,/2x Figure 1. Basic PLL Block Diagram Description CY23FP12 CLKB5 CLKB4 CLKB3 CLKB2 CLKB1 CLKB0 CLKA5 CLKA4 CLKA3 CLKA2 CLKA1 CLKA0 Default +16 mA +16 mA Enable Enable Non-invert Non-invert Non-invert ...

Page 4

... CLKB3 and CLKB2 pair. Please refer to Table 3 for a list of divider values. CLKB10 Source Independently selects one out of the eight possible output dividers that will connect to the CLKB1 and CLKB0 pair. Please refer to Table 3 for a list of divider values. Document #: 38-07246 Rev. *E Description Description CY23FP12 Default Non-invert Enable Enable External Default ...

Page 5

... CY23FP12 Frequency Calculation The CY23FP12 is an extremely flexible clock buffer with up to twelve individual outputs, generated from an integrated PLL. [1] There are four variables used to determine the final output frequency ...

Page 6

... ATES UL–94 Flammability Rating FIT Failure in Time T Power-up time for all reach PU DD minimum specified voltage (power ramps must be monotonic) DC Electrical Specifications for CY23FP12SC/I Commercial/Industrial Temperature Devices Parameter Description V Core Supply Voltage DDC Bank A, Bank B DDA DDB Supply Voltage ...

Page 7

... Outputs @200 MHz, tracking skew not included All outputs equally loaded Same frequency Different frequency Different voltage, same frequency Measured at V /2, REF to FBK DD Measured Bank A and B same frequency Bank A and B different frequency CY23FP12 Min. Typ. Max. Unit 10 200 MHz 1 V/ ...

Page 8

... Input reference clock @ < 50-KHz modulation with ±3.75% spread Stable power supply, valid clock at REF Max loop delay for PLL Lock (stable frequency) Max loop delay to meet Tracking Skew Spec 1.4V 3.3V 0. CY23FP12 Min. Typ. Max. Unit 200 ps 1 Page ...

Page 9

... CY23FP12OCT 28-pin SSOP – Tape and Reel CY23FP12OI 28-pin SSOP CY23FP12OIT 28-pin SSOP – Tape and Reel CY3672 Development Kit CY3692 CY23FP12S Socket (Label CY3672 ADP006) Lead-free CY23FP12OXC 28-pin SSOP CY23FP12OXCT 28-pin SSOP – Tape and Reel CY23FP12OXI 28-pin SSOP CY23FP12OXIT 28-pin SSOP – ...

Page 10

... Document History Page Document Title: CY23FP12 200-MHz Field Programmable Zero Delay Buffer Document Number: 38-07246 Orig. of REV. ECN NO. Issue Date Change ** 115158 07/03/02 *A 121880 12/14/02 *B 124523 03/19/03 *C 126938 06/16/03 *D 129364 09/10/03 *E 299718 See ECN Document #: 38-07246 Rev. *E Description of Change HWT New data sheet RBI Power-up requirements added to Absolute Maximum Ratings information ...

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