ASM2P2304NZ
Four Output PCI-X and
General Purpose Buffer
Features
One input to four Output Buffer/Driver
General-purpose or PCI-X clock buffer
Buffers all frequencies from DC to 140MHz
Output-to-output skew less than 100pS
Available in 8-pin TSSOP and SOIC Packages
3.3V operation
Functional Description
The ASM2P2304NZ is a low-cost buffer designed to
distribute high-speed clocks for PCI-X and other
applications. The device operates at 3.3V and outputs can
run up to 140MHz.
Table 1. Function Table.
Inputs
BUF_IN
L
H
L
H
Outputs
Output [1:4]
L
L
L
H
L
L
H
H
OE
Block Diagram
OE
Logic
Control
BUF_ IN
OUTPUT 1
OUTPUT 2
OUTPUT 3
OUTPUT 4
©2010 SCILLC. All rights reserved.
JANUARY 2010 – Rev. 2
Publication Order Number:
ASM2P2304/D
ASM2P2304NZ
Pin Configuration
BUF_IN 1
OE 2
OUTPUT 1 3
GND 4
8 OUTPUT 4
7 OUTPUT 3
ASM2P2304NZ
NZ
6 V
DD
5 OUTPUT 2
Pin Description
Pin #
1
2
3
4
5
6
7
8
Notes:
Pin Name
BUF_IN
OE
Output 1
GND
Output 2
V
DD
Output 3
Output 4
2
2
2
2
1
Type
I
I
O
P
O
P
O
O
Description
Input clock. 5V Tolerant Input.
Input pin for Output Enable, active HIGH.
Connect to V
DD
.
Output 1.
Ground.
Output 2.
3.3V Voltage Supply.
Output 3.
Output 4.
1. Weak pull down on input.
2. Weak pull down on all outputs.
Rev. 2 | Page 2 of 9 | www.onsemi.com
ASM2P2304NZ
Absolute Maximum Ratings
Parameter
Supply Voltage to Ground Potential
DC Input Voltage (Except BUF_IN)
DC Input Voltage (BUF_IN)
Storage Temperature
Max. Soldering Temperature (10 sec)
Junction Temperature
Static Discharge Voltage
(As per JEDEC STD22- A114-B)
Description
-0.5
-0.5
-0.5
-65
Min
7
V
DD
+ 0.5
7
+150
260
150
2000
Max
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
Parameter
V
DD
T
A
C
L
C
IN
BUF_IN,
OUTPUT [1:4]
t
PU
Supply Voltage
Operating Temperature (Ambient Temperature)
Load Capacitance
Input Capacitance
Operating Frequency
Power-up time for all V
DD
’s to reach minimum specified
Voltage (Power ramps must be monotonic)
DC
0.05
Description
Min
3.0
-40
Max
3.6
85
25
7
140
50
Unit
V
°C
pF
pF
MHz
mS
Rev. 2 | Page 3 of 9 | www.onsemi.com
ASM2P2304NZ
Electrical Characteristics
Parameter
V
IL
V
IH
I
IL
I
IH
Description
Input LOW Voltage
1
Test Conditions
Min
Max
0.8
Unit
V
V
Input HIGH Voltage
1
2.0
V
IN
= 0V
V
IN
= V
DD
I
OL
= 24mA
-5
-5
5
12
0.8
0.55
2.0
2.4
25
Input LOW Current
Input HIGH Current
µA
µA
V
V
V
V
mA
V
OL
Output LOW Voltage
2
I
OL
= 12mA
I
OH
= -24mA
V
OH
Output HIGH Voltage
2
I
OH
= -12mA
I
DD
Notes:
Supply Current
Unloaded outputs at 66.66MHz
1. BUF_IN input has a threshold voltage of V
DD
/2.
2. Parameter is guaranteed by design and characterization. It is not 100% tested in production.
Switching Characteristics for Commercial and Industrial Temperature Devices
Parameter
t
D
t
3
t
4
t
5
3
Name
Duty Cycle = t
2
÷t
1
Rise Time
Fall Time
2
2
2
Description
Measured at 1.5V
Measured between 0.8V and 2.0V
Measured between 2.0V and 0.8V
2
Min
40.0
Typ
50.0
Max
60.0
1.50
1.50
100
150
Unit
%
nS
nS
pS
Output to Output Skew
All outputs
equally
loaded
For Commercial parts
For Industrial parts
2.5
3.5
t
6
Notes:
Propagation Delay,
BUF_IN Rising Edge to
2
OUTPUT Rising Edge
Measured at V
DD
/2
5
nS
1. BUF_IN input has a threshold voltage of V
DD
/2.
2. Parameter is guaranteed by design and characterization. It is not 100% tested in production.
3. All parameters specified with loaded outputs.
Rev. 2 | Page 4 of 9 | www.onsemi.com
ASM2P2304NZ
Switching Waveforms
Duty Cycle Timing
All Outputs Rise/Fall Time
Output-Output Skew
Input-Output Propagation Delay
Rev. 2 | Page 5 of 9 | www.onsemi.com
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