CY2SSTV16857 SpectraLinear, CY2SSTV16857 Datasheet

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CY2SSTV16857

Manufacturer Part Number
CY2SSTV16857
Description
14-Bit Regstered Buffer PC2700-/PC3200-Compliant
Manufacturer
SpectraLinear
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CY2SSTV16857ZC
Manufacturer:
DELTAELEC
Quantity:
20 300
Part Number:
CY2SSTV16857ZXC
Quantity:
4 000
www.DataSheet4U.com
Rev 1.0, November 21, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Features
Description
This 14-bit registered buffer is designed specifically for 2.3V to
2.7V V
0°C to + 85°C.
All inputs are compatible with the JEDEC Standard for
SSTL_2, except the LVCMOS reset (RESET) input. All outputs
are SSTL_2, Class II-compatible.
The SSTV16857 operates from a differential clock (CLK and
CLK). Data is measured at the crossing of CLK going HIGH,
and CLK going LOW.
• Differential Clock Inputs up to 280 MHz
• Supports LVTTL switching levels on the RESET pin
• Output drivers have controlled edge rates, so no
• Two KV ESD protection
• Latch-up performance exceeds 100 mA: JESD78, Class II
• Conforms to JEDEC STD (JESD82-3) for buffered DDR
• 48-pin TSSOP
external resistors are required
DIMMs
Block Diagram
DD
operation and is characterized for operation from
RESET
VREF
CLK
CLK
D1
To 13 Other Channels
14-Bit Registered Buffer PC2700-/PC3200-Compliant
1D
C1
R
Tel:(408) 855-0555
Q1
When RESET is LOW, the differential input receivers are
disabled, and undriven (floating) data, clock, and REF voltage
inputs are allowed. In addition, when RESET is LOW, all
registers are reset and all outputs force to the LOW state. The
LVCMOS RESET input must always be held at a valid logic
HIGH or LOW level.
To ensure defined outputs from the register before a stable
clock has been supplied, RESET must be held in the LOW
state during power-up.
In the DDR registered DIMM application, RESET is specified
to be completely asynchronous with respect to CLK and CLK.
Therefore, no timing relationship can be guaranteed between
the two. When entering reset, the register will be cleared and
the outputs will be driven LOW quickly, relative to the time to
disable the differential input receivers, thus ensuring no
glitches on the output. However, when coming out of reset, the
register will become active quickly, relative to the time to
enable the differential input receivers. As long as the data
inputs are low, and the clock is stable during the time from the
LOW-to-HIGH transition of RESET until the input receivers are
fully enabled, the design must ensure that the outputs will
remain LOW.
Fax:(408) 855-0550
Pin Configuration
VDDQ
VDDQ
VDDQ
VDDQ
VDDQ
VSS
VSS
VSS
VSS
VSS
Q10
Q11
Q12
Q13
Q14
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
CY2SSTV16857
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
www.SpectraLinear.com
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
D1
D2
VSS
VDD
D3
D4
D5
D6
D7
CLK
CLK
VDD
VSS
VREF
RESET
D8
D9
D10
D11
D12
VDD
VSS
D13
D14
Page 1 of 7

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CY2SSTV16857 Summary of contents

Page 1

... LOW-to-HIGH transition of RESET until the input receivers are fully enabled, the design must ensure that the outputs will remain LOW. Pin Configuration Tel:(408) 855-0555 Fax:(408) 855-0550 CY2SSTV16857 VSS 3 ...

Page 2

... Data outputs, SSTL_2, Class II output. D(1:14) I Data input clocked on the crossing of the rising edge of CLK, and the falling edge of CLK. CLK, CLK I/I Differential clock input. VDDQ Power Power supply voltage quiet, 2.5V nominal. VREF I Input reference voltage, 1.25V nominal. CY2SSTV16857 Description Page ...

Page 3

... JEDEC (JESD 51) By design and verification By design and verification = Temperature = 0°C to +85 °C) DD Description PC1600,2100,2700 PC3200 PC3200 PC1600,2100,2700 /2) PC3200 RESET RESET DDQ 100 DDQ V = 2.3V DD CY2SSTV16857 < < out Condition Min. Max. 2.3 2 ±50 > V ± – ...

Page 4

... Fast slew rate, (see notes 5 and 7), Data before CLK, CLK Slow slew rate, (see notes 6 and 7), Data before CLK, CLK Fast slew rate, (see notes 5 and 7), Data after CLK, CLK Slow slew rate (see notes 6 and 7), Data after CLK, CLK CY2SSTV16857 Condition Min. Typ. = 2.3V to 2.7V – ...

Page 5

... CY2SSTV16857 V = 2.5V ± 0.2V DD Min. Max. Unit 280 1.1 2.8 ns 4.3 ns 0.85 4 V/ns 1.0 4 V/ns Pull-Up Min I (mA) Max I (mA –5 –15 –10 –27 –15 –38 –19 –49 –23 –60 – ...

Page 6

... DDQ Min. Max. 4 V/ns Figure 3. Voltage Waveforms Propagation Delay Times 4 V/ns VI(PP) VICR Figure 4. Voltage Waveforms Propagation Delay Times VIH** VREF* VREF* VIL*** [11, 13, 14] CY2SSTV16857 LVCMOS RESET VDD/2 VDD/2 Input t t inact act IDD 90% 10% Low- and High-level Enabling VICR VICR Input t ...

Page 7

... CY2SSTV16857ZI 48-pin TSSOP CY2SSTV16857ZIT 48-pin TSSOP –Tape and Reel Lead-Free CY2SSTV16857ZXC 48-pin TSSOP CY2SSTV16857ZXCT 48-pin TSSOP –Tape and Reel www.DataSheet4U.com CY2SSTV16857ZXI 48-pin TSSOP CY2SSTV16857ZXIT 48-pin TSSOP –Tape and Reel Package Drawing and Dimensiona 0.500[0.019 0.500[0.020] 0.851[0.033] BSC ...

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