DATASHEET
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
Description
Features
The MK2304-1 is a low jitter, low skew, high performance
Phase Lock Loop (PLL) based zero delay buffer for high
speed applications. Based on IDT’s proprietary low jitter
PLL techniques, the device provides four low skew outputs
at speeds up to 133 MHz at 3.3 V. The MK2304-1 includes
two banks of two outputs each 1X. In the zero delay mode,
the rising edge of the input clock is aligned with the rising
edges of all 4 outputs. Compared to competitive CMOS
devices, the MK2304-1 has the lowest jitter.
•
•
•
•
•
•
Packaged in 8-pin SOIC
Zero input-output delay
2 banks of two 1X outputs
Output to output skew is less than 200 ps
Output clocks up to 133 MHz at 3.3 V
Full CMOS outputs with 8 mA output drive capability at
TTL levels at 3.3 V
• Spread SmartTM technology Works with Spread
IDT manufactures the largest variety of clock generators
and buffers and is the largest clock supplier in the world.
Spectrum clock generators
• Advanced, low power, sub micron CMOS process
• Operating voltage of 3.3 V
• Available in industrial temperature range
Block Diagram
VDD
1
FBIN
CLKIN
CLKA1
PLL
CLKA2
BANK
A
CLKB1
CLKB2
BANK
B
1
GND
IDT™ ZERO DELAY, LOW SKEW BUFFER
1
MK2304-1
REV E 010709
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
ZDB
Pin Assignment
Feedback Configuration Table
REF
1
8
FBK
CLKA1
2
7
VDD
CLKA2
3
6
CLKB2
GND
4
5
CLKB1
Feedback From
Bank A
Bank B
CLKA1:A2
CLKIN
CLKIN
CLKB1:B2
CLKIN
CLKIN
8 Pi n ( 150 mi l ) SOI C
Pin Descriptions
Pin
Number
Pin Name
Pin Type
1
REF
Input
2
CLKA1
Output
Clock A1 output.
3
CLKA2
Output
Clock A2 output.
4
GND
Power
Connect to ground.
5
CLKB1
Output
Clock B1 output.
6
CLKB1
Output
Clock B2 output.
7
VDD
Power
3.3 V Power Supply.
8
FBK
Input
PLL feedback input.
IDT™ ZERO DELAY, LOW SKEW BUFFER
Pin Description
Clock input. Connect to input clock source. 5 V tolerant input.
2
MK2304-1
REV E 010709
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
ZDB
External Components
The Mk2304-1 requires a minimum number of external components for proper operation. Decoupling capacitors of
0.1µF should be connected between VDD and GND, as close to the part as possible. A 33Ω series terminating
resistor should be used on each clock output to reduce reflections.
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the MK2304-1. 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
Rating
Supply Voltage, VDD
7V
All Inputs and Outputs, except CLKIN
-0.5 V to VDD+0.5 V
CLKIN
-0.5 V to +5.5 V
Ambient Operating Temperature (commercial)
0 to +70 ° C
Ambient Operating Temperature (industrial)
-40 to +85 ° C
Storage Temperature
-65 to +150 ° C
Junction Temperature
175 ° C
Soldering Temperature
260 ° C
Recommended Operation Conditions
Parameter
Min.
Max.
Units
0
+70
°C
Ambient Operating Temperature (industrial)
-40
+85
°C
Power Supply Voltage (measured in respect to GND)
+3.0
+3.6
V
Ambient Operating Temperature (commercial)
IDT™ ZERO DELAY, LOW SKEW BUFFER
3
Typ.
MK2304-1
REV E 010709
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
ZDB
DC Electrical Characteristics
VDD=3.3 V ±10%, Commercial temperature 0 to +70° C
Parameter
Symbol
Conditions
Min.
Operating Voltage
VDD
3.0
Input High Voltage
VIH
2
Input Low Voltage
VIL
Output High Voltage
VOH
IOH = -8 mA
Output Low Voltage
VOL
IOL = 8 mA
Operating Supply Current
100 MHz, CLKIN
IDD
No Load
Short Circuit Current
IOS
Each output
Input Capacitance
CIN
FBIN
Typ.
Max.
Units
3.6
V
V
0.8
2.4
V
V
0.4
V
45
mA
TBD
mA
7
pF
VDD=3.3 V ±10%, Industrial temperature -40 to +85° C
Parameter
Symbol
Conditions
Min.
Operating Voltage
VDD
3.0
Input High Voltage
VIH
2
Input Low Voltage
VIL
Output High Voltage
VOH
IOH = -8 mA
Output Low Voltage
VOL
IOL = 8 mA
Operating Supply Current
100 MHz, CLKIN
IDD
No Load
Short Circuit Current
IOS
Each output
Input Capacitance
CIN
FBIN
IDT™ ZERO DELAY, LOW SKEW BUFFER
Typ.
Max.
Units
3.6
V
V
0.8
4
2.4
V
V
0.4
V
45
mA
TBD
mA
7
pF
MK2304-1
REV E 010709
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
ZDB
AC Electrical Characteristics
VDD = 3.3 V ±10%, Commercial Temperature 0 to +70° C
Parameter
Symbol
Conditions
Min.
Typ.
Max. Units
Output Frequency
FBIN to CLKA1,
30 pF Load
10
100
MHz
Output Frequency
FBIN to CLKA1,
15 pf Load
10
133
MHz
Output Rise Time
tOR
0.8 to 2.0 V, CL=30 pF
2.2
ns
Output Rise Time
tOR
0.8 to 2.0 V, CL=15 pF
1.5
ns
Output Fall Time
tOF
0.8 to 2.0 V, CL=30 pF
2.2
ns
Output Fall Time
tOF
0.8 to 2.0 V, CL=15 pF
1.5
ns
Output Clock Duty Cycle
At 1.4 V, CL=30 pf
40
50
60
%
Output Clock Duty Cycle
At 1.4 V, CL=15 pf
45
50
55
%
Device to Device skew, equally
loaded
Rising edges at VDD/2
500
ps
Output to Output skew, equally
loaded, On same bank
Rising edges at VDD/2
200
ps
Skew from Output Bank A to
Output Bank B
All outputs equally loaded
400
ps
Delay CLKIN Rising Edge to
FBIN Rising Edge
Measured at VDD/2
±250
ps
Maximum Absolute Jitter
300
Cycle to Cycle Jitter
PLL Lock Time
tLOCK
ps
30 pF loads
66.67 MHz outputs
400
ps
15pF loads
66.67 MHz outputs
375
ps
1
ms
Stable power supply, valid
clocks on CLKIN, FBIN
VDD = 3.3V ±10%, Industrial Temperature -40 to +85° C
Parameter
Symbol
Conditions
Min.
Typ.
Max. Units
Output Frequency
FBIN to CLKA1,
30 pF Load
10
100
MHz
Output Frequency
FBIN to CLKA1,
15 pf Load
10
133
MHz
Output Rise Time
tOR
0.8 to 2.0 V, CL=30 pF
2.5
ns
Output Rise Time
tOR
0.8 to 2.0 V, CL=15 pF
1.5
ns
Output Fall Time
tOF
0.8 to 2.0 V, CL=30 pF
2.5
ns
Output Fall Time
tOF
0.8 to 2.0 V, CL=15 pF
1.5
ns
IDT™ ZERO DELAY, LOW SKEW BUFFER
5
MK2304-1
REV E 010709
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
Parameter
ZDB
Symbol
Conditions
Min.
Typ.
Max. Units
Output Clock Duty Cycle
At 1.4 V, CL=30 pf
40
50
60
%
Output Clock Duty Cycle
At 1.4 V, CL=15 pf
40
50
60
%
Device to Device skew, equally
loaded
Rising edges at VDD/2
500
ps
Output to Output skew, equally
loaded, On same bank
Rising edges at VDD/2
FIN=100 MHz
200
ps
Skew from Output Bank A to
Output Bank B
All outputs equally loaded
400
ps
Delay CLKIN Rising Edge to
FBIN Rising Edge
Measured at VDD/2
±250
ps
Maximum Absolute Jitter
300
Cycle to Cycle Jitter
PLL Lock Time
30 pF loads
66.67 MHz outputs
400
ps
15 pF loads
66.67 MHz outputs
375
ps
1
ms
Stable power supply, valid
clocks on CLKIN, FBIN
tLOCK
ps
Thermal Characteristics
Parameter
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Case
Symbol
Conditions
Min.
Typ.
Max. Units
θJA
Still air
120
° C/W
θJA
1 m/s air flow
115
° C/W
θJA
3 m/s air flow
105
° C/W
58
° C/W
θJC
Marking Diagram (MK2304S-1LF)
8
5
2304S-1L
######
YYWW
1
4
Notes:
1. Line 1: part number
2. Line 2: ###### = lot number
3. Line 3: YYWW = date code.
IDT™ ZERO DELAY, LOW SKEW BUFFER
6
MK2304-1
REV E 010709
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
ZDB
Package Outline and Package Dimensions (8 pin SOIC, 150 Mil. Narrow Body)
Package dimensions are kept current with JEDEC Publication No. 95
Millimeters
Inches
8
Symbol
E
A
A1
B
C
D
E
e
H
h
L
α
H
INDEX
AREA
1 2
D
A
Min
Max
1.35
1.75
0.10
0.25
0.33
0.51
0.19
0.25
4.80
5.00
3.80
4.00
1.27 BASIC
5.80
6.20
0.25
0.50
0.40
1.27
0°
8°
Min
Max
.0532
.0688
.0040
.0098
.013
.020
.0075
.0098
.1890
.1968
.1497
.1574
0.050 BASIC
.2284
.2440
.010
.020
.016
.050
0°
8°
h x 45
A1
C
-Ce
SEATING
PLANE
B
L
.10 (.004)
C
Ordering Information
Part / Order Number
Marking
Shipping Packaging
Package
Temperature
MK2304S-1
MK2304S1
Tubes
8-pin SOIC
0 to 70° C
MK2304S-1T
MK2304S1
Tape and Reel
8-pin SOIC
0 to 70° C
MK2304S-1I
2304S1I
Tubes
8-pin SOIC
-40° to 85° C
MK2304S-1IT
2304S1I
Tape and Reel
8-pin SOIC
-40° to 85° C
MK2304S-1LF
2304S-1L
Tubes
8-pin SOIC
0 to 70° C
MK2304S-1LFT
2304S-1L
Tape and Reel
8-pin SOIC
0 to 70° C
MK2304S-1ILF
2304S1IL
Tubes
8-pin SOIC
-40° to 85° C
MK2304S-1ILFT
2304S1IL
Tape and Reel
8-pin SOIC
-40° to 85° C
Parts that are ordered with a "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes
no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No
other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications
such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not
recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT
does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.
IDT™ ZERO DELAY, LOW SKEW BUFFER
7
MK2304-1
REV E 010709
MK2304-1
ZERO DELAY, LOW SKEW BUFFER
ZDB
Innovate with IDT and accelerate your future networks. Contact:
www.IDT.com
For Sales
For Tech Support
800-345-7015
408-284-8200
Fax: 408-284-2775
www.idt.com/go/clockhelp
Corporate Headquarters
Integrated Device Technology, Inc.
www.idt.com
© 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device
Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered
trademarks used to identify products or services of their respective owners.
Printed in USA