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PDF W191 Data sheet ( Hoja de datos )
| Número de pieza | W191 | |
| Descripción | Skew Controlled SDRAM Buffer | |
| Fabricantes | SpectraLinear | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de W191 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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W191
Skew Controlled SDRAM Buffer
Features
• Six skew controlled CMOS outputs
• Output skew between any two outputs is less than 150 ps
• SMBus Serial configuration interface
www.DataShe•et24.U5.cnosmto 5 ns propagation delay
• DC to 133 MHz operation (Commercial)
• DC to 100 MHz operation (Industrial)
• Single 3.3V supply voltage
• Low power CMOS design packaged in a 16-pin SSOP
(Small Shrink Outline Package)
Block Diagram
Key Specifications
Supply Voltages: ...................................... VDDQ3 = 3.3V ±5%
Operating Temperature: (Commercial) ............. 0°C to +70°C
Operating Temperature: (Industrial) .............. –40°C to +85°C
Input Threshold:...................................................1.5V typical
Maximum Input Voltage: .................................. VDDQ3 + 0.5V
Input Frequency: (Commercial) ........................0 to 133 MHz
Input Frequency: (Industrial).............................0 to 100 MHz
BUF_IN to SDRAM0:5 Propagation Delay:.......2.5 ns to 5 ns
Min. Output Edge Rate: ............................................. 1.0V/ns
Max. Output Skew: ..................................................... 150 ps
Output Duty Cycle:...................................45/55% worst case
Output Impedance: ...................................................15: typ.
Pin Configuration[1]
SDATA
SCLOCK
SMBus
Device Control
BUF_IN
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM0
GND
SDRAM1
BUF_IN
GND
SDRAM2
VDDQ3
SDATA
1
2
3
4
5
6
7
8
16 VDDQ3
15 SDRAM5
14 GND
13 SDRAM4
12 VDDQ3
11 SDRAM3
10 GND
9 SCLK
Note:
1. Internal pull-up resistor of 250K on SDATA and SCLK.
Rev 1.0, November 20, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:(408) 855-0555 Fax:(408) 855-0550
Page 1 of 9
www.SpectraLinear.com
1 page  
W191
AC Electrical Characteristics: TA = 0°C to +70°C (Commercial), VDDQ3 = 3.3V ± 5%,TA = -40°C to +85°C (Industrial),
VDDQ3 = 3.3V ± 5% (Lump Capacitance Test Load = 30pF)
Parameter
fIN
fIN
tR
Description
Input Frequency (Commercial)
Input Frequency (Industrial)
Output Rise Edge Rate
tF
www.DataSheet4U.com
tSR
tSF
tEN
tDIS
tPR
tPF
tD
Zo
Output Fall Edge Rate
Output Skew, Rising Edges
Output Skew, Falling Edges
Output Enable Time
Output Disable Time
Rising Edge Propagation Delay
Falling Edge Propagation Delay
Duty Cycle
AC Output Impedance
Test Condition
Measured from 0.4V
to 2.4V
Measured from 2.4V
to 0.4V
Measured at 1.5V
Min.
0
0
1.0
1.0
1.0
1.0
2.5
2.5
45
Typ.
15
Max.
133
100
4.0
4.0
150
150
8.0
8.0
5.0
5.0
55
Unit
MHz
MHz
V/ns
V/ns
ps
ps
ns
ns
ns
ns
%
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Rev 1.0, November 20, 2006
Page 5 of 9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet W191.PDF ] | |
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