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PDF ASM2I2318ANZ Data sheet ( Hoja de datos )
| Número de pieza | ASM2I2318ANZ | |
| Descripción | 3.3V SDRAM Buffer | |
| Fabricantes | Alliance Semiconductor | |
| Logotipo |  |
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June 2005
rev 0.3
ASM2I2318ANZ
18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs
Features
One input to 18 output Buffer/Driver
Supports up to four SDRAM DIMMs
Two additional outputs for feedback
Serial interface for individual output control
Low skew outputs (< 250 pS)
Up to 133 MHz operation
Dedicated OE pin for testing
Space-saving 48 Pin SSOP package
3.3V operation
Functional Description
The ASM2I2318ANZ is a 3.3V buffer designed to distribute
high-speed clocks in PC applications. The part has 18
outputs, 16 of which can be used to drive up to four
SDRAM DIMMs, and the remaining can be used for
external feedback to a PLL. The device operates at 3.3V
and outputs can run up to 133MHz, thus making it
compatible with Pentium II®* processors. The
ASM2I2318ANZ can be used in conjunction with the clock
synthesizer for a complete Pentium II motherboard
solution. The ASM2I2318ANZ also includes a serial
interface which can enable or disable each output clock.
On power-up, all output clocks are enabled (internal pull
up). A separate Output Enable pin facilitates testing on
ATE.
*Pentium is a registered trademark of Intel Corporation.
Block Diagram
BUF_IN
SDATA
SCLOCK
OE
Serial Interface
Decoding
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM4
SDRAM5
SDRAM6
SDRAM7
SDRAM8
SDRAM9
SDRAM10
SDRAM11
SDRAM12
SDRAM13
SDRAM14
SDRAM15
SDRAM16
SDRAM17
Alliance Semiconductor
2575, Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com
Notice: The information in this document is subject to change without notice.
1 page  
June 2005
ASM2I2318ANZ
rev 0.3
Electrical Characteristics
(Test condition: All parameters values are valid within the Operating range, unless otherwise stated)
Parameter
Description
Test Conditions
VIL Input LOW Voltage
For all pins except serial interface pins
VILiic
Input LOW Voltage
For serial pins only
VIH Input HIGH Voltage
VOL Output LOW Voltage1
VOH Output HIGH Voltage1
IOL= 25 mA
IOH = –36 mA
ICC
Quiescent Supply Current
VDD= 3.465V, Vi = VDD or GND, IO =0
IOZ
High Impedance Output
Current
VDD= 3.465V, Vi = VDD or GND
IOFF
Off-State Current
(for SCL ,SDATA)
VDD= 0V, Vi = 0V or 5.5V
VDD= 3.135V to 3.465V
∆ICC Change in Supply Current One Input at VDD-0.6, All other Inputs
at VDD or GND
Ii Input Leakage
VDD= 3.465V or GND
(Applicable to all Input Pins)
IDD Supply Current1
IDD Supply Current1
IDD Supply Current1
IDD Supply Current1
IDD Supply Current1
IDD Supply Current1
Unloaded outputs, 133 MHz
Loaded outputs, 30pF,133 MHz
Unloaded outputs, 100 MHz
Loaded outputs, 30pF, 100 MHz
Unloaded outputs, 66.67 MHz
Loaded outputs, 30pF, 66.67 MHz
IDDS Supply Current
BUF_IN=VDD or VSS,
all other inputs at VDD
Note: 1. Parameter is guaranteed by design and characterization. Not 100% tested in production.
Min
2.0
2.4
-5
Typ
50
Max
0.8
0.7
0.4
100
±10
Unit
V
V
V
V
V
µA
µA
50 µA
500 µA
+5 µA
150 mA
400 mA
110 mA
300 mA
80 mA
200 mA
500 µA
18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs
Notice: The information in this document is subject to change without notice.
5 of 13
5 Page 
June 2005
rev 0.3
Package Information
48L SSOP Package (300 mil)
ASM2I2318ANZ
Symbol
A
A1
B
C
D
E
H
L
e
α
Dimensions
Inches
Millimeters
Min Max Min Max
0.095
0.110
2.413
2.794
0.008
0.016
0.203
0.406
0.008
0.012
0.203
0.305
0.005
0.009
0.127
0.228
0.620
0.630
15.75
16.002
0.291
0.299
7.39
7.59
0.395
0.420
10.033
10.67
0.020
0.040
0.508
1.016
0.025 BSC
0.635 BSC
0° 8° 0° 8°
18 Output, 3.3V SDRAM Buffer for Desktop PCs with 3 DIMMs
Notice: The information in this document is subject to change without notice.
11 of 13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet ASM2I2318ANZ.PDF ] | |
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