View MK74CB115_85340.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MK74CB115 1 to 16 BuffaloTM Clock Driver
Description
The MK74CB115 BuffaloTM is a monolithic CMOS high speed clock driver. It consists of a single input to sixteen low-skew output, noninverting clock drivers. The chip is capable of driving 16 CMOS loads up to 200 MHz with a maximum of 250 ps output to output skew. The MK74CB115 is packaged in the tiny 28 pin SSOP, which uses the same board space as the narrow 16 pin SOIC.
Features
* Tiny 28 pin SSOP (150 mil) package * One input to sixteen output clock drivers * Outputs are skew matched to within 250 ps * 3.3V10% or 5V10% supply voltage * 3 Output Enables allow configuration as 1 to 4, 1 to 6, 1 to 10, 1 to 12 or 1 to 16 buffer * Clock speeds up to 200 MHz
Family of ICS Parts
The MK74CB115 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.
Block Diagram
OE2
VDD
4
IN Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
4
Q15 Q14 Q13 Q12 Q11 Q10 Q9 Q8
OE1
GND
OE0
1 Revision 020800 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race St. * San Jose * CA * 95126 * (408) 295-9800tel * www.icst.com
MDS 74CB115 D
MK74CB115 1 to 16 BuffaloTM Clock Driver
Pin Assignment
OE1 Q0 Q1 Q2 VDD VDD Q3 Q4 GND GND Q5 Q6 Q7 IN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 OE2 27 Q15 26 Q14 25 Q13 24 VDD 23 VDD 22 Q12 21 Q11 20 GND 19 GND 18 Q10 17 Q9 16 Q8 15 OE0
Suggested Layout
V 0.1F G
V 0.1F G
For simplicity, series terminating resistors (required) 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 G = connect to GND
Pin Descriptions
Number Name 1 OE1 2, 3 Q0, Q1 4, 7, 8 Q2, Q3, Q4 5, 6 VDD 9, 10 GND 11, 12, 13 Q5, Q6, Q7 14 IN 15 OE0 16, 17, 18 Q8, Q9, Q10 19, 20 GND 21, 22, 25 Q11, Q12, Q13 23, 24 VDD 26, 27 Q14, Q15 28 OE2 Type I O O P P O I I O P O P O I Description Output Enable. Tri-states Q2 to Q7 clock outputs when this input is low. Internal pull-up. Clock outputs. Clock outputs. Power supply. Connect to +3.3 V or 5 V. Connect to ground. Clock outputs. Clock input for 16 buffers. Output Enable. Tri-states Q8 to Q13 clock outputs when this input is low. Internal pull-up. Clock outputs. Connect to ground. Clock outputs. Power supply. Connect to +3.3 V or 5 V. Clock outputs. Output Enable. Tri-states Q0, Q1, Q15 and Q14 clock outputs when this input is low. Internal pull-up.
Type: I = Input, O = output, P = power supply connection
2 Revision 020800 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race St. * San Jose * CA * 95126 * (408) 295-9800tel * www.icst.com
MDS 74CB115 D
MK74CB115 1 to 16 BuffaloTM Clock Driver
Electrical Specifications
Parameter Supply Voltage, VDD Inputs Clock Outputs Ambient Operating Temperature Soldering Temperature Storage Temperature Operating Voltage, VDD Input High Voltage, VIH (IN pin) Input Low Voltage, VIL (IN pin) Input High Voltage, VIH (OE pins) Input Low Voltage, VIL (OE pins) Output High Voltage, 3.3V Output High Voltage, 3.3V Output Low Voltage, 3.3V Operating Supply Current, IDD, at 100 MHz Output Impedance Short Circuit Current, 3.3V On-Chip Pull-up Resistor Input Capacitance Input Clock Frequency with load = 8 pF Propagation Delay with load = 15pF Output Clock Rise Time Output Clock Fall Time Output Clock Rising Edge Skew Output Enable Time, OE high to output on Output Disable Time, OE low to tri-state Conditions Referenced to GND Referenced to GND Referenced to GND Max of 20 seconds -65 3.0 (VDD/2)+1 2.0 0.8 IOH=-8mA IOH=-12mA IOL=12mA No Load Each output OE0, OE1, OE2 VDD-0.4 2.4 0.8 55 14 50 250 5 0 1.4 0.8 to 2.0V 2.0 to 0.8V At VDD/2. Note 2 200 3 2 2 250 20 20 3.3 VDD/2 VDD/2 Minimum Typical Maximum 7 VDD+0.5 VDD+0.5 70 260 150 5.5 (VDD/2)-1 Units V V V C C C V V V V V V V V mA mA k pF MHz ns ns ns ps ns ns
ABSOLUTE MAXIMUM RATINGS (Note 1)
0.5 0.5 0
DC CHARACTERISTICS (VDD = 3.3 V unless noted)
Input clock Input clock
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
Note 4, 5
100
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. 3. At VDD = 3.3 V, 70C, series termination of 33 per pin , 8 pF load per pin. 4. See discussion and graph of speed versus load, Graph 1 on following page.
3 Revision 020800 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race St. * San Jose * CA * 95126 * (408) 295-9800tel * www.icst.com
MDS 74CB115 D
MK74CB115 1 to 16 BuffaloTM Clock Driver
Maximum Speed/Application Notes
The maximum speed at which the chip can operate is limited by power dissipation of the package. Graph 1 shows the operating frequency plotted against load capacitance per pin for a die temperature of 125C. This is at VDD = 3.3 V, 70C and with 33 series termination resistor. 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 temperature greater than 125C. Also note that the load capacitance per pin must include PC board parasitics such as trace capacitance. ICS has other buffers specified to 250 MHz with heavier loads. If not all outputs of the chip are used, it is possible to operate the chip faster with larger loads. Unused outputs should be left unconnected. Consult ICS for your specific requirement.
300 250 200 150 100 50 0 0 20 40 60 80
Do not operate in this area .
Load Capacitance/per pin (pF), all 16 outputs loaded Graph 1 MK74CB115 Maximum Speed at 3.3 V
4 Revision 020800 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race St. * San Jose * CA * 95126 * (408) 295-9800tel * www.icst.com
MDS 74CB115 D
MK74CB115 1 to 16 BuffaloTM Clock Driver
Package Outline and Package Dimensions (For current dimensional specifications, see JEDEC Publication No. 95.)
28 pin SSOP
Symbol A A1 b c D e E E1 L Inches Min Max 0.053 0.069 0.004 0.010 0.008 0.012 0.007 0.010 0.386 0.394 .025 BSC 0.228 0.244 0.150 0.157 0.016 0.050 Millimeters Min Max 1.35 1.75 0.102 0.254 0.203 0.305 0.191 0.254 9.804 10.008 0.635 BSC 5.791 6.198 3.810 3.988 0.406 1.270
E1
E
INDEX AREA
1
2
D A1 e Ordering Information
Part/Order Number MK74CB115R MK74CB115RTR Marking MK74CB115R MK74CB115R
c b
A L
Package 28 pin SSOP Add Tape & Reel
Temperature 0-70C 0-70C
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
5 Revision 020800 Printed 11/16/00 Integrated Circuit Systems, Inc. * 525 Race St. * San Jose * CA * 95126 * (408) 295-9800tel * www.icst.com
MDS 74CB115 D

▲Up To Search▲

Price & Availability of MK74CB115

	To Download MK74CB115 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .