1
PS8704A 9/22/04
1:5/1:7 3.3V CMOS Clock Drivers
Description
Pericom Semiconductor's PI49FCT3280x is a 3.3V very low-skew
clock buffer from a single low-capacitance input that produces five
outputs on PI49FCT32802 and seven outputs on PI49FCT32803.
Excellent output signals to power and ground ratio minimize power
and ground noise, and also improves output performance.
The PI49FCT3280x integrates series damping resistors on all
outputs.
Pin Configuration (PI49FCT32802)
Block Diagram (PI49FCT32802)
PI49FCT32802
PI49FCT32803
Features
Low skew: < 200ps
Fast switching frequency >133 MHz
Fast output rise/fall time < 1.5ns
Low propagation delay < 2.5ns
Low input capacitance < 6.0pF
5V Tolerant input
Rail-to-Rail CMOS outputs
Industrial Temperature: 40C to +85C
3.3V 10% operation
Packages (Pb-free & Green available):
16-pin 150-mil wide QSOP (Q)
16-pin 173-mil wide TSSOP (L)
A
B
0
B
1
B
2
B
3
B
4
Pin Configuration (PI49FCT32803)
Block Diagram (PI49FCT32803)
A
B
0
B
1
B
2
B
3
B
6
VCC
A
1
16
B4
GND
2
15
B3
B0
3
14
GND
VCC
4
13
B2
B1
5
12
VCC
GND
6
11
NC
NC
7
10
GND
VCC
8
9
16-Pin
L, Q
VCC
A
1
16
B6
GND
2
15
B5
B0
3
14
GND
VCC
4
13
B4
B1
5
12
VCC
GND
6
11
B3
B2
7
10
GND
VCC
8
9
16-Pin
L, Q
Pin Description
Pin Name
Description
PI49FCT32802
PI49FCT32803
A
A
Input
B0B4
B0B6
Outputs
GND
GND
Ground
V
CC
V
CC
Power
2
PS8704A 9/22/04
PI49FCT32802
PI49FCT32803
1:5/1:7 3.3V CMOS Clock Drivers
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional operation
of the device at these or any other conditions above those
indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect reliability.
Storage Temperature ............................................................65C to +150C
Ambient Temperature with Power Applied ...........................40C to +85C
Supply Voltage to Ground Potential........................................0.5V to +5.5V
DC Input Voltage ....................................................................0.5V to +5.5V
DC Output Current............................................................................... 120mA
Power Dissipation ................................................................................... 0.5W
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 3.3V, +25C ambient and maximum loading.
3. V
OH
= V
CC
0.6V at rated current.
4. This parameter is determined by device characterization but is not production tested.
5. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
DC Electrical Characteristics
(Over the Operating Range)
Symbol
Description
Test Conditions
(1)
Min.
Typ.
Max.
Units
V
OH
Output HIGH voltage V
CC
=3V,V
IN
=V
IH
or V
IL
I
OH
= 8mA
2.4
3
V
V
OL
Output LOW voltage
V
CC
=3V, V
IN
=V
IH
or V
IL
I
OL
= 12mA
0.4
0.5
V
IH
Input HIGH voltage
Guaranteed Logic HIGH Level (Input Pins)
2
5.5
V
IL
Input LOW voltage
Guaranteed Logic LOW Level (Input Pins)
0.5
0.8
I
IH
Input HIGH current
V
CC
= 3.6V
V
IN
= 3.6V
1
A
I
IL
Input LOW current
V
CC
= 3.6V
V
IN
= 0V
1
V
IK
Clamp diode voltage
V
CC
= Min., I
IN
= 18mA
0.7
1.2
V
I
OH
Output HIGH current V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
OUT
= 1.5V
(5)
25
45
80
mA
I
OL
Output LOW current
V
CC
= 3.3V, V
IN
= V
IH
or V
IL
, V
OUT
= 1.5V
(5)
25
45
90
I
OS
Short circuit current
(5)
V
CC
= Max., V
OUT
= GND
(5)
50
100
180
V
H
Input Hysteresis
150
mV
R
S
Series Resistor
22
3
PS8704A 9/22/04
PI49FCT32802
PI49FCT32803
1:5/1:7 3.3V CMOS Clock Drivers
Power Supply Characteristics
Parameters
Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power
Supply Current
V
CC
= Max.
V
IN
= GND
or V
CC
--
0.1
30
A
I
CC
Supply Current per
Inputs @ TTL HIGH
V
CC
= Max.
V
IN
= V
CC
0.6V
(3)
--
47
300
I
CCD
Supply Current per
Input per MHz
(4)
V
CC
= Max.,
Outputs Open
Per Output Toggling
50% Duty Cycle
V
IN
= V
CC
--
mA/
V
IN
= GND
0.08
0.16
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 3.3V, +25C ambient.
3. Per TTL driven input (V
IN
= V
CC
0.6V); all other inputs at V
CC
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the I
C
formula. These limits are guaranteed but not tested.
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(1)
Description
Test Conditions
Typ
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
3.0
4
pF
C
OUT
Output Capacitance
V
OUT
= 0V
6
Notes:
1. This parameter is determined by device characterization but is not production tested.
Notes:
1. Other loading condition is described on page 4, "Test Circuits for All Outputs."
2. These parameters are guaranteed by design.
3. Minimum propagation delay of 1.5ns is guaranteed by design.
Maximum Switching Characteristics
(Over operating range)
Symbol
Description
Condition
Max.
Units
t
PLH
t
PHL
Propagation Delay A to Bn
(3)
CL =15pF
2.5
ns
t
R/tF
Rise/Fall Time
(2)
0.8V 2.0V
1.5
t
SK(p)
Pulse Skew (same pkg)
(1,2)
CL =15pF
0.35
t
SK(o)
Output Skew (same pkg.)
(1,2)
0.2
t
SK(t)
Output Skew (different pkg.)
(1,2)
0.55
F
IN
Input Frequency
(1,2)
133
MHz
4
PS8704A 9/22/04
PI49FCT32802
PI49FCT32803
1:5/1:7 3.3V CMOS Clock Drivers
Tests Circuits for All Outputs
Switching Waveforms
Propagation Delay
Package Skew t
SK
(t)
Pulse Skew t
SK
(p)
Output Skew t
SK
(o)
Input
t
PLH
3V
1.5V
0V
Output
V
OH
1.5V
V
OL
t
PHL
2.0V
0.5V
t
R
t
F
Input
t
PLHx
3V
1.5V
0V
Ox
V
OH
1.5V
V
OL
t
PHLx
t
SK(o)
Oy
V
OH
1.5V
V
OL
t
SK(o)
t
PLHy
t
PHLy
t
SK(o)
= t
PLHy
t
PLHx
or t
PHLy
t
PHLx
Input
t
PLH
3V
1.5V
0V
Output
V
OH
1.5V
V
OL
t
PHL
t
SK(p)
= t
PHL
t
PLH
Input
t
PLH1
3V
1.5V
0V
Package 1
Output
V
OH
1.5V
V
OL
t
PHL1
t
SK(t)
Package 2
Output
V
OH
1.5V
V
OL
t
SK(t)
t
PLH2
t
PHL2
t
SK(t)
= t
PLH2
t
PLH1
or t
PHL2
t
PHL1
Pulse
Generator
f = 125MHz
D.U.T.
50
C
L
15pF
V
CC
5
PS8704A 9/22/04
PI49FCT32802
PI49FCT32803
1:5/1:7 3.3V CMOS Clock Drivers
.189
.197
.053
.069
.004
.010
SEATING
PLANE
.025
BSC
.007
.010
.228
.244
1
16
.150
.157
.016
.050
X.XX
X.XX
DENOTES DIMENSIONS IN MILLIMETERS
0.635
4.80
5.00
1.35
1.75
5.79
6.19
0.101
0.254
.008
.012
0.203
0.305
3.81
3.99
0.178
0.254
0.38
0.41
1.27
.008
0.203
.015 x 45
REF
Detail A
Detail A
.008
0.20
MIN.
Guage Plane
.010
0.254
.041
1.04
REF
.016
.035
0.41
0.89
0-6
.008
.013
0.20
0.33
.193
.201
.047
max.
.002
.006
SEATING
PLANE
.0256
BSC
.018
.030
.004
.008
.252
BSC
1
16
.169
.177
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
0.05
0.15
6.4
0.45
0.75
0.09
0.20
4.3
4.5
1.20
4.9
5.1
0.65
0.19
0.30
.007
.012
Packaging Mechanical: 16-pin TSSOP (L)
Packaging Mechanical: 16-pin QSOP (Q)
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