MK74CB163
1 to 16 PECL to CMOS BuffaloTM Clock Driver
MDS 74CB163 A
1
Revision 112399
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126 (408)295-9800tel www.icst.com
PRELIMINARY INFORMATION
Tiny 28 pin SSOP (150 mil) package
One input to sixteen output clock drivers
Outputs are skew matched to within 250ps
3.3 V10% supply voltage
Clock speeds up to 156 MHz
2 Output Enables allow configuration as 1 to 6, 1
to 10, or 1 to 16 buffers.
Converts PECL input to CMOS level outputs
The MK74CB163 BuffaloTM is a monolithic
CMOS high speed clock driver. It consists of a
PECL input to sixteen low-skew output, non-
inverting clock drivers. This monolithic solution
eliminates any concern for part-to-part skew
matching. The MK74CB163 is packaged in the
tiny 28 pin SSOP, which uses the same board
space as the narrow 16 pin SOIC.
VDD
GND
Q15
Block Diagram
Description
Features
OE1
Family of ICS Parts
The MK74CB163 BuffaloTM is designed to be
used with ICS's clock synthesizer devices. The
inputs of the Buffalo are matched to the outputs of
ICS clock synthesizers. Consult ICS for
applications support.
Q14
Q13
Q12
Q11
Q10
Q8
Q9
OE0
Q0
Q1
Q2
Q3
Q4
Q5
Q7
Q6
PECLIN
PECLIN
4
4
MK74CB163
1 to 16 PECL to CMOS BuffaloTM Clock Driver
MDS 74CB163 A
2
Revision 112399
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126 (408)295-9800tel www.icst.com
PRELIMINARY INFORMATION
Number
Name
Type
Description
1
OE0
I
Output Enable. Tri-states Q0 to Q5 clock outputs when this input is low. Internal pull-up.
2, 3, 4
Q0, Q1, Q2
O
Clock outputs.
5, 6
VDD
P
Power supply. Connect to +3.3V.
7, 8
Q3, Q4
O
Clock outputs.
9, 10
GND
P
Connect to ground.
11, 12, 13
Q5, Q6, Q7
O
Clock outputs.
14
PECLIN
I
Complementary PECL input.
15
PECLIN
I
True PECL input.
16, 17, 18
Q8, Q9, Q10
O
Clock outputs.
19, 20
GND
P
Connect to ground.
21, 22
Q11, Q12
O
Clock outputs.
23, 24
VDD
P
Power supply. Connect to +3.3V.
25, 26, 27 Q13, Q14, Q15
O
Clock outputs.
28
OE1
I
Output Enable. Tri-states Q6 to Q15 clock outputs when this input is low. Internal pull-up.
Pin Descriptions
Type: I = Input, O = output, P = power supply connection
Pin Assignment
1
8
9
2
3
4
5
6
7
10
11
12
13
14
Q0
Q1
Q2
Q3
Q4
Q5
Q7
Q6
OE0
GND
GND
VDD
VDD
Q15
Q14
Q13
Q12
Q11
Q10
Q8
Q9
OE1
GND
GND
PECLIN
VDD
VDD
16
15
17
18
19
20
21
22
23
24
25
28
27
26
Suggested Layout
V
G
G
V
For simplicity, 33
series termination resistors are not
shown for the outputs, but should be placed as close to the
device as possible. It is most critical to have the 0.1F
decoupling capacitors closest.
V = connect to VDD
= connect to GND
G
0.1F
0.1F
PECLIN
MK74CB163
1 to 16 PECL to CMOS BuffaloTM Clock Driver
MDS 74CB163 A
3
Revision 112399
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126 (408)295-9800tel www.icst.com
PRELIMINARY INFORMATION
Electrical Specifications
Parameter
Conditions
Minimum
Typical
Maximum
Units
ABSOLUTE MAXIMUM RATINGS (Note 1)
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage, VDD
Referenced to GND
7
V
Inputs
Referenced to GND
0.5
VDD+0.5
V
Clock Outputs
Referenced to GND
0.5
VDD+0.5
V
Ambient Operating Temperature
0
70
C
Soldering Temperature
Max of 20 seconds
260
C
Storage Temperature
-65
150
C
DC CHARACTERISTICS (VDD = 3.3 V unless noted)
DC CHARACTERISTICS (VDD = 3.3 V unless noted)
Operating Voltage, VDD
3.0
3.6
V
Input High Voltage, VIH (OE0, OE1 pins)
2.0
V
Input Low Voltage, VIL (OE0, OE1 pins)
0.8
V
Output High Voltage, VOH
IOH=-12mA
VDD-0.5
V
Output Low Voltage, VOL
IOL=12mA
0.5
V
Operating Supply Current, IDD, at 66.6MHz
No Load
TBD
mA
Short Circuit Current
Each output
70
mA
On-Chip Pull-up Resistor
OE0, OE1
250
k
Input Capacitance (OE0, OE1)
7
pF
Peak-to-Peak Input Voltage, VPP
PECL inputs
300
1000
mV
Common Mode Range, VCMR
PECL inputs
VDD-1.4
VDD-0.6
V
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
Input Clock Frequency
0
156
MHz
Propagation Delay with load=15pF
ns
Output Clock Rise Time
0.8 to 2.0V
ns
Output Clock Fall Time
2.0 to 0.8V
ns
Output Clock Rising Edge Skew
Note 2
-250
0
250
ps
Output Enable Time, OE high to output on
5
20
ns
Output Disable Time, OE low to tri-state
5
20
ns
Output Duty Cycle, Load = 15 pF at VDD/2
0-125 MHz
45
50
55
%
Output Duty Cycle, Load = 15 pF at VDD/2
125-156 MHz
40
50
60
%
Notes:
1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels
above the operating limits but below the Absolute Maximums may affect device reliability.
2. Between any two outputs, with equal loading, measured at VDD/2. The maximum skew between any 2 pins is 250 ps not 500 ps.
MK74CB163
1 to 16 PECL to CMOS BuffaloTM Clock Driver
MDS 74CB163 A
4
Revision 112399
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126 (408)295-9800tel www.icst.com
PRELIMINARY INFORMATION
300
250
200
150
100
50
0
80
60
40
20
0
Maximum Speed
The maximum speed at which the chip can operate can be limited by power dissipation in the package.
Graph 1 shows the operating frequency plotted against load capacitance per pin for a die temperature of
125 C. This is at VDD = 3.3 V, 70 C and with 33
series termination resistors. The termination
resistors are essential because they allow a large proportion of the total power to be dissipated outside the
package. Reducing or eliminating the series termination will cause an increase in die temperature. It is not
recommended to operate the chip at die temperatures greater than 125 C. Also note that the load
capacitance per pin must include PC board parasitics such as trace capacitance. The MK74CB163 can safely
operate up to 156 MHz with all pins loaded at 15 pF.
Do not operate in this area .
Load Capacitance/per pin (pF)
Graph 1
Maximum Speed
MK74CB163
1 to 16 PECL to CMOS BuffaloTM Clock Driver
MDS 74CB163 A
5
Revision 112399
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA95126 (408)295-9800tel www.icst.com
PRELIMINARY INFORMATION
B
D
E
H
e
A1
C
A
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC publication no. 95)
Ordering Information
28 pin SSOP (QSOP)
While the information presented herein has been checked for both accuracy and reliability, ICS Incorporated 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 ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS
product for use in life support devices or critical medical instruments.
Buffalo is a trademark of ICS Incorporated
Part/Order Number
Marking
Package
Temperature
MK74CB163R
MK74CB163R
28 pin SSOP (QSOP)
0-70C
MK74CB163RTR
MK74CB163R
Add Tape & Reel
0-70C
L
Inches
Inches
Millimeters
Millimeters
Symbol
Min
Max
Min
Max
A
0.053
0.069
1.35
1.75
A1
0.004
0.01
0.10
0.25
B
0.008
0.012
0.20
0.30
C
0.007
0.010
0.19
0.25
D
0.386
0.394
9.80
10.01
E
0.150
0.157
3.81
3.99
H
0.228
0.244
5.79
6.20
e .025 BSC
.025 BSC
0.635 BSC
0.635 BSC
L
0.016
0.05
0.41
1.27
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