DATASHEET
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER ICS552-02
IDT™ / ICS™
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER 1
ICS552-02 REV K 092309
Description
The ICS552-02 is a low skew, single-input to eight-
output clock buffer. The device offers a dual input with
pin select for switching between two clock sources. It is
part of IDT’s ClockBlocksTM family. See the ICS553 for
a 1 to 4 low skew buffer. For more than 8 outputs see
the MK74CBxxx BuffaloTM series of clock drivers.
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.
Features
•
Extremely low skew outputs (50ps maximum)
•
Packaged in 16 pin TSSOP
•
Available in Pb (lead) free package
•
Low power CMOS technology
•
Operating Voltages of 2.5 V to 5 V
•
Output Enable pin tri-states outputs
•
5 V tolerant input clocks
•
Input/Output clock frequency up to 200 MHz
•
Input clock multiplexer simplifies clock selection
•
Industrial temperature
NOTE: EOL for non-green parts to occur on
5/13/10 per PDN U-09-01
Block Diagram
O E
Q 3
Q 4
Q 2
Q 5
Q 6
Q 1
Q 0
Q 7
IN A
IN B
1
0
SELA
ICS552-02
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER CLOCK MUX AND BUFFER
IDT™ / ICS™
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER 2
ICS552-02 REV K 092309
Pin Assignment Input Source Select
Pin Descriptions
External Components
A minimum number of external components are required for proper operation. Decoupling capacitors of
0.01 µF should be connected between VDD on pin 2 and GND on pin 7, and between VDD on pin 15 and
GND on pin 10, as close to the device as possible. A 33 Ω series terminating resistor should be used on
each clock output if the trace is longer than 1 inch.
To achieve the low output skews that the ICS552-02 is capable of, careful attention must be paid to board
layout. Essentially, all 8 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 30Ω series termination
on one output (with 33Ω on the others) will cause at least 15ps of skew.
12
1
11
2
10
3
9
OE
4
VDD
5
Q0
6
VDD
7
Q1
8
Q2
Q7
Q6
Q5
Q3 Q4
INA
GND GND
16
15
14
13
INB
SELA
16 Pin TSSOP
SELA Input
0 INB
1 INA
Pin
Number
Pin
Name
Pin
Type
Pin Description
1 OE Input Output Enable. Tri-states outputs when low. Internal pull-up resistor.
2 VDD Power Connect to +2.5V, +3.3V or +5.0V. Must be the same as pin 15.
3 Q0 Output Clock Output 0
4 Q1 Output Clock Output 1
5 Q2 Output Clock Output 2
6 Q3 Output Clock Output 3
7 GND Power Connect to ground.
8 INB Input Clock Input B. 5V tolerant input.
9 INA Input Clock Input A. 5V tolerant input.
10 GND Power Connect to ground.
11 Q4 Output Clock Output 4
12 Q5 Output Clock Output 5
13 Q6 Output Clock Output 6
14 Q7 Output Clock Output 7
15 VDD Power Connect to + 2.5V, +3.3V or +5.0V. Must be the same as pin 2.
16 SELA Input Selects either INA or INB. Internal pull-up resistor.
ICS552-02
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER CLOCK MUX AND BUFFER
IDT™ / ICS™
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER 3
ICS552-02 REV K 092309
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS552-02. 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.
Recommended Operation Conditions
DC Electrical Characteristics
VDD=2.5 V ±5%
, Ambient temperature -40 to +85 °C, unless stated otherwise
Item Rating
Supply Voltage, VDD 7 V
SELA, OE, and all Outputs -0.5 V to VDD+0.5 V
INA and INB -0.5V to 5.5V
Ambient Operating Temperature -40 to +85 °C
Storage Temperature -65 to +150 °C
Junction Temperature 175 °C
Soldering Temperature 260 °C
Parameter Min. Typ. Max. Units
Ambient Operating Temperature -40 – +85 °C
Power Supply Voltage (measured in respect to GND) +2.375 +5.25 V
Parameter Symbol Conditions Min. Typ. Max. Units
Operating Voltage VDD 2.375 2.625 V
Input High Voltage, INA, INB V
IH
Note 1 VDD/2+0.5 5.5 V
Input Low Voltage, INA, INB V
IL
Note 1 VDD/2-0.5 V
Input High Voltage, OE, SELA V
IH
1.8 VDD V
Input Low Voltage, OE, SELA V
IL
0.7 V
Output High Voltage V
OH
I
OH
= -16 mA 2 V
Output Low Voltage V
OL
I
OL
= 16 mA 0.4 V
Operating Supply Current IDD No load, 135 MHz 35 mA
Short Circuit Current I
OS
Each output 60 mA
ICS552-02
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER CLOCK MUX AND BUFFER
IDT™ / ICS™
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER 4
ICS552-02 REV K 092309
DC Electrical Characteristics (continued)
VDD=3.3 V ±5%
, Ambient temperature -40 to +85 °C, unless stated otherwise
VDD=5 V ±5%
, Ambient temperature -40 to +85 °C, unless stated otherwise
Note: 1. Nominal switching threshold is VDD/2
Parameter Symbol Conditions Min. Typ. Max. Units
Operating Voltage VDD 3.135 3.465 V
Input High Voltage, INA, INB V
IH
Note 1 VDD/2+0.7 5.5 V
Input Low Voltage, INA, INB V
IL
Note 1 VDD/2-0.7 V
Input High Voltage, OE, SELA V
IH
2 VDD V
Input Low Voltage, OE, SELA V
IL
0.8 V
Output High Voltage V
OH
I
OH
= -25 mA 2.4 V
Output Low Voltage V
OL
I
OH
= 25 mA 0.4 V
Output High Voltage (CMOS
Level)
V
OH
I
OH
= -12 mA VDD-0.4 V
Operating Supply Current IDD No load, 135 MHz 50 mA
Short Circuit Current I
OS
Each output 80 mA
Parameter Symbol Conditions Min. Typ. Max. Units
Operating Voltage VDD 4.75 5.25 V
Input High Voltage, INA, INB V
IH
Note 1 VDD/2+1 5.5 V
Input Low Voltage, INA, INB V
IL
Note 1 VDD/2-1 V
Input High Voltage, OE, SELA V
IH
2 VDD V
Input Low Voltage, OE, SELA V
IL
0.8 V
Output High Voltage V
OH
I
OH
= -35 mA 2.4 V
Output Low Voltage V
OL
I
OL
= 35 mA 0.4 V
Output High Voltage (CMOS
Level)
V
OH
I
OH
= -12 mA VDD-0.4 V
Operating Supply Current IDD No load, 135 MHz 85 mA
Short Circuit Current I
OS
Each output 100 mA
ICS552-02
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER CLOCK MUX AND BUFFER
IDT™ / ICS™
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER 5
ICS552-02 REV K 092309
AC Electrical Characteristics
VDD = 2.5V ±5%
, Ambient Temperature -40 to +85 °C, unless stated otherwise
VDD = 3.3V ±5%
, Ambient Temperature -40 to +85 °C, unless stated otherwise
VDD = 5.0V ±5%
, Ambient Temperature -40 to +85 °C, unless stated otherwise
Notes: 1. With rail-to-rail input clock.
2. Between any two outputs with equal loading.
3. Propagation delay matching through the part.
4. Duty cycle on outputs will match incoming clock duty cycle. Consult IDT for tight duty cycle clock
generators.
Parameter Symbol Conditions Min. Typ. Max. Units
Input Frequency 0 200 MHz
Output Rise Time t
OR
0.8 to 2.0 V, C
L
=15 pF 1.0 1.5 ns
Output Fall Time t
OF
2.0 to 0.8 V, C
L
=15 pF 1.0 1.5 ns
Propagation Delay Note 1 3.5 ns
Output to output skew Note 2 Rising edges at VDD/2 0 50 ps
Input A to Input B skew Note 3 0 50 ps
Parameter Symbol Conditions Min. Typ. Max. Units
Input Frequency 0 200 MHz
Output Rise Time t
OR
0.8 to 2.0 V, C
L
=15 pF 0.6 1.0 ns
Output Fall Time t
OF
2.0 to 0.8 V, C
L
=15 pF 0.6 1.0 ns
Propagation Delay Note 1 2.0 3.0 5.5 ns
Output to output skew Note 2 Rising edges at VDD/2 0 50 ps
Input A to Input B skew Note 3 0 50 ps
Part to Part Skew 3.5 ns
Parameter Symbol Conditions Min. Typ. Max. Units
Input Frequency 0 200 MHz
Output Rise Time t
OR
0.8 to 2.0 V, C
L
=15 pF 0.3 0.7 ns
Output Fall Time t
OF
2.0 to 0.8 V, C
L
=15 pF 0.3 0.7 ns
Propagation Delay Note 1 2.8 ns
Output to output skew Note 2 Rising edges at VDD/2 0 50 ps
Input A to Input B skew Note 3 0 50 ps
ICS552-02
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER CLOCK MUX AND BUFFER
IDT™ / ICS™
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER 6
ICS552-02 REV K 092309
Package Outline and Package Dimensions
(16 pin TSSOP, 4.40 mm Body, 0.65 mm Pitch)
Package dimensions are kept current with JEDEC Publication No. 95, MO-153
Ordering Information
*NOTE: EOL for non-green parts to occur on 5/13/10 per PDN U-09-01
Parts that are ordered with an “LN” 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.
Part / Order Number Marking Shipping Packaging Package Temperature
552G-02I* 552G-02I Tubes 16-pin TSSOP -40 to +85 °C
552G-02IT* 552G-02I Tape and Reel 16-pin TSSOP -40 to +85 °C
552G-02ILN 552G02IN Tubes 16-pin TSSOP -40 to +85 °C
552G-02ILNT 552G02IN Tape and Reel 16-pin TSSOP -40 to +85 °C
INDEX
AR EA
1 2
16
D
E1 E
SE AT ING
P LAN E
A
1
A
A
2
e
- C -
b
aaa
C
α
c
L
Millimeters Inches
Symbol Min Max Min Max
A -- 1.20 -- 0.047
A1 0.05 0.15 0.002 0.006
A2 0.80 1.05 0.032 0.041
b 0.19 0.30 0.007 0.012
C 0.09 0.20 0.0035 0.008
D 4.90 5.1 0.193 0.201
E 6.40 BASIC 0.252 BASIC
E1 4.30 4.50 0.169 0.177
e 0.65 Basic 0.0256 Basic
L 0.45 0.75 0.018 0.030
α
0
°
8
°
0
°
8
°
aaa -- 0.10 -- 0.004
© 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
Corporate Headquarters
Integrated Device Technology, Inc.
www.idt.com
For Sales
800-345-7015
408-284-8200
Fax: 408-284-2775
For Tech Support
www.idt.com/go/clockhelp
Innovate with IDT and accelerate your future networks. Contact:
www.IDT.com
ICS552-02
LOW SKEW 2 INPUT MUX AND 1 TO 8 CLOCK BUFFER CLOCK MUX AND BUFFER
