CY28343 Cypress Semiconductor, CY28343 Datasheet

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CY28343

Manufacturer Part Number
CY28343
Description
Zero Delay SDR/DDR Clock Buffer
Manufacturer
Cypress Semiconductor
Datasheet

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Quantity:
5 177
Features
Table 1. Function Table
Note:
Cypress Semiconductor Corporation
Document #: 38-07369 Rev. *A
1.
0 = SDRAM Mode
• Phase-lock loop clock distribution for DDR and SDR
• One-single-end clock input to 6 pairs DDR outputs or
• External feedback pins FBIN_SDR/FBOUT_SDR are
SELDDR_SDR#
1= DDR Mode
SDRAM applications
13 SDR outputs.
used to synchronize the outputs to the clock input for
SDR.
Block Diagram
*SELDDR_SDR
Pins marked with [*] have internal pull-down resistors. Pins marked with [**] have internal pull-up resistors.
FBIN_DDR
FBIN_SDR
CLKIN
SDATA
SCLK
VDD_3.3V
PLL
Compatible
Compatible
CLKIN
2.5V
3.3V
Control
Logic
SDRAM(0:12) DDRT/C(0:5) FBIN_DDR
Compatible
Active
3.3V
OFF
3901 North First Street
Compatible
Active
2.5V
OFF
VDD_3.3V
VDD_2.5V
Zero Delay SDR/DDR Clock Buffer
FBOUT_DDR
FBOUT_SDR
DDRT(0:5)
DDRC(0:5)
SDRAM (0:12)
• External feedback pins FBIN_SDR/FBOUT_SDR are
• SMBus interface enables/disables outputs.
• Conforms to JEDEC SDR/DDR specifications
• Low jitter, low skew
• 48 pin SSOP package
Compatible
used to synchronize the outputs to the clock input for
DDR.
2.5V
OFF
Pin Configuration
San Jose
FBOUT_SDR
FBIN_SDR*
VDD_3.3V
VDD_3.3V
SDRAM10
SDRAM11
VDD_3.3V
VDD_3.3V
SDRAM12
FBOUT_DDR
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
SDRAM9
Compatible
CLKIN
VSS
VSS
VSS
Active
VSS
2.5V
OFF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
CA 95134
[1]
Revised December 26, 2002
Compatible
FBIN_SDR FBOUT_SDR
Active
OFF
3.3V
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
DDRC2
SELDDR_SDR#*
FBIN_DDR*
FBOUT_DDR
VDD_2.5V
DDRT5
DDRC5
DDRT4
DDRC4
VSS
VDD_2.5
DDRT3
DDRC3
DDRT2
VSS
VDD_2.5V
DDRT1
DDRC1
DDRT0
DDRC0
VSS
VDD_3.3V
SCLK**
SDATA**
CY28343
408-943-2600
Compatible
Active
OFF
3.3V

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CY28343 Summary of contents

Page 1

... SSOP package OFF Active 2.5V 2.5V Compatible Compatible Active OFF OFF 3.3V Pin Configuration VDD_2.5V FBOUT_DDR DDRT(0:5) DDRC(0:5) VDD_3.3V FBOUT_SDR SDRAM (0:12) • 3901 North First Street • CY28343 FBOUT_DDR FBIN_SDR FBOUT_SDR Active OFF 2.5V Compatible OFF Active 3.3V Compatible Compatible [ SELDDR_SDR#* VDD_3. FBIN_DDR* SDRAM0 3 ...

Page 2

... For these applications the CY28343 offers single-end input as a PLL reference. The CY28343 then can lock onto the reference and translate with near zero to low-skew outputs. For normal operation, the ex- ternal feedback input, FBIN_DDR and FBIN_SDR, are con- ...

Page 3

... Read 29 Acknowledge from slave 30:37 Byte count from slave – 8 bits 38 Acknowledge 39:46 Data byte from slave –8 bits 47 Acknowledge 48:55 Data byte from slave – 8 bits 56 Acknowledge .... Data bytes from slave/Acknowledge .... Data byte N from slave – 8 bits .... Not Acknowledge .... Stop CY28343 Page ...

Page 4

... Command Code – 8 bits'1xxxxxxx' stands for byte operationbit[6:0] of the command code rep- resents the offset of the byte to be accessed 19 Acknowledge from slave 20 Repeat start 21:27 Slave address – 7 bits 28 Read 29 Acknowledge from slave 30:37 Data byte from slave – 8 bits 38 Not Acknowledge 39 stop [4] Description [4] Description CY28343 Page ...

Page 5

... SDRAM9 Enable Output disabled asynchronously in a low state SDRAM8 Enable Output disabled asynchronously in a low state Byte 3: Silicon Register (Read Only) Bit @Pup Pin # 7 1 Vendor ID 1000 Cypress Revision Document #: 38-07369 Rev. *A [4] Description Description CY28343 Page ...

Page 6

... Typ. Max. 1.0 2.2 –0.3 0.8 –0.3 0.7 2 0 0.3 DD –10 10 235 300 4 Min. Typ. Max. 99 170 1.5 1.0 2 125 200 150 1.1 V – 0 /2) – 0 / CY28343 Unit Unit MHz % % ms V/ Page ...

Page 7

... VDD_3.3V = 3.3V ±5% 100 MHz, 133 MHz @133 MHz @133 MHz [11] [11] [11] 1.25V /1.5V 1.25V /1 large num ber o f sam ples Figure 1. Phase Error CY28343 Min Typ Max 99 133 0.4 1 200 400 200 1.1 V – 0.4 ...

Page 8

... Figure 4. Differential Signal Using Direct Terminal Resistor Document #: 38-07369 Rev Figure 2. Output Skew Figure 3. Cycle-to-Cycle Jitter T PCB 120 T PCB CY28343 Measurement Point 2 pF Measurement Point 2 pF Page ...

Page 9

... The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. Package Type 48-Lead Shrunk Small Outline Package O48 CY28343 Product Flow Commercial Commercial ...

Page 10

... Document Title:CY28343 Zero Delay SDR/DDR Clock Buffer Document #: 38-07369 Issue Rev. ECN No. Date ** 116671 08/22/02 *A 122909 12/26/02 Document #: 38-07369 Rev. *A Orig. of Change DMG New Data Sheet RBI Add power up requirements to maximum ratings information CY28343 Description of Change Page ...

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