CY2SSTV850 Cypress Semiconductor, CY2SSTV850 Datasheet

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CY2SSTV850

Manufacturer Part Number
CY2SSTV850
Description
Differential Clock Buffer/Driver
Manufacturer
Cypress Semiconductor
Datasheet

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Part Number:
CY2SSTV8500C
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CY
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Part Number:
CY2SSTV850ZC
Manufacturer:
CY
Quantity:
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STV850
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Features
Cypress Semiconductor Corporation
Document #: 38-07457 Rev. *A
• Phase-locked loop clock distribution for Double Data
• 1:10 differential outputs
• External Feedback pins (FBINT, FBINC) are used to syn-
• SSCG: Spread Aware™ for EMI reduction
• 48-pin SSOP and TSSOP packages
• Conforms to JEDEC JC40 and JC42.5 DDR
Block Diagram
Rate Synchronous DRAM applications
chronize the outputs to the clock input
specifications
CLKINC
SDATA
CLKINT
FBINC
AVDD
FBINT
SCLK
PLL
Interface
Serial
Logic
10
3901 North First Street
FBOUTT
FBOUTC
YT2
YC2
YT3
YC3
YT4
YC4
YT5
YC5
YT6
YC6
YT7
YC7
YT8
YC8
YT9
YC9
YT0
YC0
YT1
YC1
Description
This PLL clock buffer is designed for 2.5 VDD and 2.5 AVDD
operation and differential data input and output levels.
This device is a zero-delay buffer that distributes a differential
clock input pair (CLKINT, CLKINC) to ten differential pair of
clock outputs (YT[0:9], YC[0:9]) and one differential pair feed-
back clock output (FBOUTT, FBOUTC). The clock outputs are
individually controlled by the serial inputs SCLK and SDATA.
The two-line serial bus can set each output clock pair (YT[0:9],
YC[0:9]) to the Hi-Z state. When AVDD is grounded, the PLL
is turned off and bypassed for test purposes.
The PLL in this device uses the input clocks (CLKINT,CLKINC)
and the feedback clocks (FBINT,FBINC) to provide high-per-
formance, low-skew, low-jitter output differential clocks.
Differential Clock Buffer/Driver
Pin Configuration
CLKINC
CLKINT
VDDQ
VDDQ
AVDD
SCLK
AVSS
VDDI
VSS
VSS
VSS
VDD
VSS
VSS
YC0
YC1
YC2
YC3
YC4
YT1
YT2
YT3
YT4
YT0
San Jose
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
Revised December 18, 2001
48
47
46
45
44
43
42
41
40
39
38
37
36
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33
32
31
30
29
28
27
26
25
CY2SSTV850
FBINC
FBOUTT
VSS
YC5
YT5
VDDQ
YT6
YC6
VSS
VSS
YC7
YT7
VDDQ
SDATA
FBINT
VDDQ
FBOUTC
VSS
YC8
YT8
VDDQ
YT9
YC9
VSS
408-943-2600

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CY2SSTV850 Summary of contents

Page 1

... Serial YC3 Interface YT4 Logic YC4 YT5 YC5 YT6 YC6 YT7 YC7 PLL YT8 YC8 YT9 YC9 FBOUTT FBOUTC • 3901 North First Street CY2SSTV850 Pin Configuration VSS 1 48 VSS 2 47 YC5 YC0 3 46 YT5 YT0 4 45 VDDQ VDDQ 5 44 YT6 ...

Page 2

... Supply for Logic 2.5V Power Supply for Output Clock Buffers 2.5V Nominal 2.5V Power Supply for PLL Power Supply for two-line serial Interface Common Ground Analog Ground CY2SSTV850 Electrical Characteristics LV Differential Input Differential Input Differential Outputs Differential Outputs Data Input for the two-line serial ...

Page 3

... When used as a zero-delay buffer the CY2SSTV850 will likely nested clock tree application. For these applications the CY2SSTV850 offers a differential clock input pair as a PLL reference. The CY2SSTV850 then can lock onto the reference and translate with near zero delay to low-skew outputs. For normal operation, the external feedback input, FBINT, is con- nected to the feedback output, FBOUTT ...

Page 4

... SDATA hold time H(SDATA) t STOP set-up time SU(STOP) www.DataSheet4U.com Document #: 38-07457 Rev bit 1 bit 8 bits R/W Ack Command Code Data Byte 1 Ack Ack 1 bit 8 bits 1 bit Description CY2SSTV850 1 bit 8 bits Ack Byte Count N ..... Byte Byte N Stop Ack 8 bits 1 bit 1 bit Min. Max. 100 4.7 4.7 4.0 4.7 4.0 ...

Page 5

... VTR is the true input level and VCP is the complementary TR CP and is the voltage at which the differential signals must be crossing. DDQ + V |/2. In case of each clock directly terminated by a 120 resistor. See Figure CY2SSTV850 and V should be constrained to the in out < < ...

Page 6

... V = 3.3V±5%, T DDQ DDI Description VDD DD [13] 20% to 80% of VOD [14] [14] f > 66 MHz [15] f > 66 MHz [16] [16] f > 66 MHz CLKIN pins to FBIN pins at the [17] DUT CY2SSTV850 = 0°C to +70°C) A Conditions Min. Typ. = 2.5V ± 0. –100 –100 1.5 3.5 1.5 3.5 –150 –50 30 Max. ...

Page 7

... CLKINC FBINT FBINC www.DataSheet4U.com YT[0:9], FBOUTT YC[0:9], FBOUTC YT[0:9], FBOUTT YC[0:9], FBOUTC Document #: 38-07457 Rev large number of samples Figure 1. Static Phase Offset Figure 2. Dynamic Phase Offset tsk(o) Figure 3. Output Skew CY2SSTV850 Page ...

Page 8

... Figure 4. Half-Period Jitter t c( it(cc) Figure 5. Cycle-to-Cycle Jitter CY2SSTV850 t (hper_N+ c(n) -t c(n) c(n+ Page ...

Page 9

... Document #: 38-07457 Rev. *A Package Type 48-pin SSOP 48-pin SSOP - Tape and Reel 48-pin TSSOP 48-pin TSSOP - Tape and Reel 48-Lead Shrunk Small Outline Package O48 CY2SSTV850 Product Flow Commercial Commercial Commercial Commercial 51-85061-*C ...

Page 10

... 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. (continued) CY2SSTV850 51-85059-*B Page ...

Page 11

... Revision History Document Title: CY2SSTV850 Differential Clock Buffer/Driver Document #: 38-07457 Rev. *A Issue REV. ECN NO. Date ** 117540 09/09/02 *A 122933 12/18/02 www.DataSheet4U.com Document #: 38-07457 Rev. *A Orig. of Change Description of Change HWT New data sheet RBI Add power up requirements to maximum ratings information CY2SSTV850 Page ...

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