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PDF ASM5P23S05A Data sheet ( Hoja de datos )
| Número de pieza | ASM5P23S05A | |
| Descripción | (ASM5P23S05A / ASM5P23S09A) 3.3V SpreadTrak Zero Delay Buffer | |
| Fabricantes | Alliance Semiconductor Corporation | |
| Logotipo |  |
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November 2004
ASM5P23S09A
ASM5P23S05A
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3.3V ‘SpreadTrak’ Zero Delay Buffer
General Features
15 MHz to 133 MHz operating range, compatible
with CPU and PCI bus frequencies.
Zero input - output propagation delay.
Multiple low-skew outputs.
Output-output skew less than 250 pS.
Device-device skew less than 700 pS.
One input drives 9 outputs, grouped as 4+4+1
(ASM5P23S09A).
One input drives 5 outputs (ASM5P23S05A).
Less than 200 pS cycle-to-cycle jitter is compatible
with Pentium® based systems.
Test Mode to bypass PLL (ASM5P23S09A only,
refer Select Input Decoding Table).
Available in 16-pin, 150-mil SOIC and 4.4 mm
TSSOP packages for ASM5P23S09A and in
8-pin, 150-mil SOIC and 4.4 mm TSSOP
packages for ASM5P23S05A.
3.3V operation
Advanced 0.35< CMOS technology.
‘SpreadTrak’.
Functional Description
ASM5P23S09A is a versatile, 3.3V zero-delay buffer
designed to distribute high-speed clocks with Spread
Spectrum capability. It is available in a 16-pin package. The
ASM5P23S05A is the eight-pin version of the
ASM5P23S09A. It accepts one reference input and drives
out five low-skew clocks.
The -1H version of the ASM5P23SxxA operates at up to
133 MHz frequency, and has higher drive than the -1
device. All parts have on-chip PLLs that lock to an input
clock on the REF pin. The PLL feedback is on-chip and is
obtained from the CLKOUT pad.
The ASM5P23S09A has two banks of four outputs each,
which can be controlled by the Select inputs as shown in
the Select Input Decoding Table. If all the output clocks are
not required, Bank B can be three-stated. The select input
also allows the input clock to be directly applied to the
outputs for chip and system testing purposes.
Multiple ASM5P23S09A and ASM5P23S05A devices can
accept the same input clock and distribute it. In this case
the skew between the outputs of the two devices is
guaranteed to be less than 700 pS.
All outputs have less than 200 pS of cycle-to-cycle jitter.
The input and output propagation delay is guaranteed to be
less than 250 pS, and the output to output skew is
guaranteed to be less than 250 pS.
The ASM5P23S09A and the ASM5P23S05A are available
in two different configurations, as shown in the ordering
information table. The ASM5P23SxxA-1 is the base part.
The ASM5P23SxxA-1H is the high drive version of the -1
part and its rise and fall times are much faster than -1 part.
Block Diagram
REF
PLL
ASM5P23S05A
CLKOUT
CLK1
CLK2
CLK3
CLK4
REF
S2
S1
PLL MUX
Select Input
Decoding
ASM5P23S09A
CLKOUT
CLKA1
CLKA2
CLKA3
CLKA4
CLKB1
CLKB2
CLKB3
CLKB4
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  
November 2004
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Absolute Maximum Ratings
ASM5P23S09A
ASM5P23S05A
Parameter
Supply Voltage to Ground Potential
DC Input Voltage (Except REF)
DC Input Voltage (REF)
Storage Temperature
Max. Soldering Temperature (10 sec)
Junction Temperature
Static Discharge Voltage
(per MIL-STD-883, Method 3015)
Min Max
-0.5 +7.0
-0.5 VDD + 0.5
-0.5 7
-65 +150
260
150
2000
Unit
V
V
V
°C
°C
°C
V
Note: These are stress ratings only and functional usage is not implied. Exposure to absolute maximum ratings for prolonged periods can affect device
reliability.
Operating Conditions for ASM5P23S05A and ASM5P23S09A - Commercial Temperature Devices
Parameter
Description
VDD Supply Voltage
TA Operating Temperature (Ambient Temperature)
CL Load Capacitance, below 100 MHz
CL Load Capacitance, from 100 MHz to 133 MHz
CIN Input Capacitance
Min Max Unit
3.0 3.6
V
0 70 °C
30 pF
10 pF
7 pF
Electrical Characteristics for ASM5P23S05A and ASM5P23S09A - Commercial Temperature Devices
Parameter
Description
Test Conditions
Min Typ Max Unit
VIL Input LOW Voltage5
VIH Input HIGH Voltage5
IIL Input LOW Current
IIH Input HIGH Current
VOL Output LOW Voltage6
VOH Output HIGH Voltage6
IDD Supply Current
ZO Output Impedance
VIN = 0V
VIN = VDD
IOL = 8mA (-1)
IOH = 12mA (-1H)
IOL = -8mA (-1)
IOH = -12mA (-1H)
Unloaded outputs at
66.67 MHz, SEL inputs at VDD
2.0
2.4
0.8
50.0
100.0
0.4
V
V
<A
<A
V
V
34 mA
23 K
Notes:
5. REF input has a threshold voltage of VDD/2
6. Parameter is guaranteed by design and characterization. Not 100% tested in production
3.3V ‘SpreadTrak’ Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
5 of 18
5 Page 
November 2004
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Package Information
ASM5P23S09A
ASM5P23S05A
8-lead (150-mil) SOIC Package
EH
D
e
B
A2 A
A1
C
L
Symbol
A1
A
A2
B
C
D
E
e
H
L
R
Dimensions
Inches
Millimeters
Min Max
Min
Max
0.004
0.010
0.053
0.069
0.049
0.059
0.012
0.020
0.007
0.010
0.193 BSC
0.154 BSC
0.050 BSC
0.236 BSC
0.016
0.050
0° 8°
0.10 0.25
1.35 1.75
1.25 1.50
0.31 0.51
0.18 0.25
4.90 BSC
3.91 BSC
1.27 BSC
6.00 BSC
0.41 1.27
0° 8°
3.3V ‘SpreadTrak’ Zero Delay Buffer
Notice: The information in this document is subject to change without notice.
11 of 18
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