PRELIMINARY DATASHEET
LOW SKEW 1 TO 4 CLOCK BUFFER
Description
The 5P30001 is a low skew, single input to four output,
clock buffer. Part of IDT’s ClockBlocks
TM
family, this is our
lowest skew, small clock buffer.
IDT makes many non-PLL and PLL based low skew output
devices as well as Zero Delay Buffers to synchronize
clocks. Contact us for all of your clocking needs.
5P30001
Features
•
•
•
•
•
•
•
•
Extremely low skew outputs (50 ps)
Packaged in 8-pin DFN
RoHS compliant packaging
Low power CMOS technology
Operating Voltages of 1.2 to 2.5 V
Output Enable pin tri-states outputs
3.3 V tolerant input clock
Industrial temperature
Block Diagram
Q0
Q1
ICLK
Q2
Q3
Output Enable
IDT™ / ICS™
LOW SKEW 1 TO 4 CLOCK BUFFER
1
5P30001
REV A 083006
5P30001
LOW SKEW 1 TO 4 CLOCK BUFFER
FANOUT BUFFER
Pin Assignment
VDD
Q0
Q1
GND
4
5
1
8
OE
Q3
Q2
ICLK
8-pin DFN
Pin Descriptions
Pin
Pin
Number Name
1
2
3
4
5
6
7
8
VDD
Q0
Q1
GND
ICLK
Q2
Q3
OE
Pin
Type
Power
Output
Output
Power
Input
Output
Output
Input
Connect to +1.2 V or +2.5 V
Clock Output 0.
Clock Output 1.
Connect to ground.
Pin Description
Clock Input. 3.3 V tolerant input.
Clock Output 2.
Clock Output 3.
Output Enable. Tri-states outputs when low. Connect to VDD for normal operation.
External Components
A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01
µ
F
should be connected between VDD on pin 1 and GND on pin 4, as close to the device as possible. A 33
Ω
series
terminating resistor may be used on each clock output if the trace is longer than 1 inch.
To achieve the low output skew that the 5P30001 is capable of, careful attention must be paid to board layout.
Essentially, all 4 outputs must have identical terminations, identical loads and identical trace geometries. If they do
not, the output skew will be degraded. For example, using a 30
Ω
series termination on one output (with 33
Ω
on the
others) will cause at least 15ps of skew.
IDT™ / ICS™
LOW SKEW 1 TO 4 CLOCK BUFFER
2
5P30001
REV A 083006
5P30001
LOW SKEW 1 TO 4 CLOCK BUFFER
FANOUT BUFFER
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the 5P30001. These ratings, which are
standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these
or any other conditions above those indicated in the operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical
parameters are guaranteed only over the recommended operating temperature range.
Item
Supply Voltage, VDD
Output Enable and All Outputs
ICLK
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Soldering Temperature
7V
Rating
-0.5 V to VDD+0.5 V
-0.5 V to 3.6 V
-40 to +85
°
C
-65 to +150
°
C
125
°
C
260
°
C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
Min.
-40
+1.1
Typ.
Max.
+85
+2.6
Units
°
C
V
IDT™ / ICS™
LOW SKEW 1 TO 4 CLOCK BUFFER
3
5P30001
REV A 083006
5P30001
LOW SKEW 1 TO 4 CLOCK BUFFER
FANOUT BUFFER
DC Electrical Characteristics
VDD=1.2 V
, Ambient temperature -40 to +85
°
C, unless stated otherwise
Parameter
Operating Voltage
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Operating Supply Current
Nominal Output Impedance
Input Capacitance
Short Circuit Current
Symbol
VDD
V
IH
V
IL
V
OH
V
OL
IDD
Z
O
C
IN
I
OS
Conditions
Note 1, ICLK, OE
Note 1, ICLK, OE
I
OH
= -2 mA
I
OL
= 2 mA
No load, 133 MHz
ICLK, OE pin
Min.
1.1
0.65xVDD
-0.3
0.75xVDD
Typ.
Max.
1.3
VDD+0.3
0.35xVDD
0.25xVDD
Units
V
V
V
V
V
mA
Ω
10
20
5
±28
pF
mA
VDD=2.5 V
, Ambient temperature -40 to +85
°
C, unless stated otherwise
Parameter
Operating Voltage
Input High Voltage, ICLK
Input Low Voltage, ICLK
Output High Voltage
Output Low Voltage
Operating Supply Current
Nominal Output Impedance
Input Capacitance
Short Circuit Current
Symbol
VDD
V
IH
V
IL
V
OH
V
OL
IDD
Z
O
C
IN
I
OS
Conditions
Note 1, ICLK, OE
Note 1, ICLK, OE
I
OH
= TBD
I
OL
= TBD
No load, 133 MHz
ICLK, OE pin
Min.
2.3
1.7
-0.3
2
Typ.
Max.
2.7
VDD+0.3
0.7
0.4
Units
V
V
V
V
V
mA
Ω
25
20
5
±28
pF
mA
Notes: 1. Nominal switching threshold is VDD/2.
AC Electrical Characteristics
VDD = 1.2 V
, Ambient Temperature -40 to +85
°
C, unless stated otherwise
Parameter
Input Frequency
Output Rise Time
Output Fall Time
Propagation Delay
Output to output skew
t
OR
t
OF
Note 1
Note 2
Rising edges at VDD/2
20% to 80%
80% to 20%
2.2
Symbol
Conditions
Min.
0
Typ.
1.0
1.0
3
0
Max. Units
170
1.5
1.5
5
50
MHz
ns
ns
ns
ps
IDT™ / ICS™
LOW SKEW 1 TO 4 CLOCK BUFFER
4
5P30001
REV A 083006
5P30001
LOW SKEW 1 TO 4 CLOCK BUFFER
FANOUT BUFFER
VDD = 2.5 V
, Ambient Temperature -40 to +85
°
C, unless stated otherwise
Parameter
Input Frequency
Output Rise Time
Output Fall Time
Propagation Delay
Output to output skew
t
OR
t
OF
Note 1
Note 2
Rising edges at VDD/2
20% to 80%
80% to 20%
2.2
Symbol
Conditions
Min.
0
Typ.
1.0
1.0
3
0
Max. Units
200
1.5
1.5
5
50
MHz
ns
ns
ns
ps
Notes: 1. With rail to rail input clock.
2. Between any 2 outputs with equal loading.
3. Duty cycle on outputs will match incoming clock duty cycle. Consult IDT for tight duty cycle clock
generators.
Thermal Characteristics
Parameter
Thermal Resistance Junction to
Ambient
Symbol
θ
JA
θ
JA
θ
JA
θ
JC
Conditions
Still air
1 m/s air flow
3 m/s air flow
Min.
Typ.
81
73
70
10.6
Max. Units
°
C/W
°
C/W
°
C/W
°
C/W
Thermal Resistance Junction to Case
Marking Diagram
8
5
####
TBD
1
Notes:
1. #### is the last four numbers of the lot number.
2. Dot indicates pin 1.
4
IDT™ / ICS™
LOW SKEW 1 TO 4 CLOCK BUFFER
5
5P30001
REV A 083006
