View SP8782_103738.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

SP8782A & B
SP8782A & B
1GHz / 16/17, /32/33 Multi-Modulus Divider
DS3651 Issue 2.4 June 1999
Features
q q q q
Advanced Resynchronisation techniques to negate loop delay effects CMOS compataible output capability Multi-Modulus division Available as DESC SMD 5962-9208901MPA
Odering Information
SP8782 A DG SP8782 B MP DES9208901/AC/DGAZ(SMD)
Description
The SP8782 is a multi-modulus divider which divides by 16/ 17 when the Ratio Select input is low and by 32/33 when theRatio Select input is high. When high, the modulus Control input selects the lower division ratio (16 or 32) and the higher ratio (17 or 33) when it is low. The device uses resynchronisation techniques to reduce the effects of propagation delays in frequency synthesis. The SP8782A (ceramic DIL package) is characterised over the full military temperature range of -55C to +125C, the SP8782B (miniature plastic DIL package) over the industrial range of -40C to+85C.
Absolute Maximum Ratings
Supply Voltage Clock input level Junction temperature Storage temperature range: SP8782A SP8782B 6V 2.5V p-p +175C -55C to +150C -55C to +125C
RATIO SELECT 1
VCC 2
CLOCK INPUT CLOCK INPUT
2 3 / 16/17 / 32/33 7 OUTPUT
4 VEE
5 MODULUS CONTROL INPUT
Figure 1 Functional Diagram
1
SP8782A & B
RATIO SELECT CLOCK INPUT CLOCK INPUT VEE
1 2 3 4
8 7 6 5
VCC OUTPUT NC MODULUS CONTROL
DG 8
RATIO SELECT CLOCK INPUT CLOCK INPUT VEE 1 2 3 4 8 7 6 5 VCC OUTPUT NC MODULUS CONTROL
MP 8
Figure 2 Typical Pin Connections
Electrical Characteristics
Unless otherwise stated, the Electrical Characteristics are guaranteed over the specified supply, frequency and temperature range. Supply Voltage, VCC = +4V to +5.5V, VEE = 0V Temperature Tamb= -55C to +125C, (SP8782A), -40C to +85 C (SP8782B)
Characteristic
Maximum frequency (sinewave input) Minimum frequency Min Slew rate for low frequency operation Power Supply current, ICC Output low voltage Output high voltage Modulus control input high voltage Modulus control input low voltage Modulus control input high current Modulus control input low current Ratio select input high voltage Ratio selected input low voltage Ratio select input current Clock to output propagation Delay Set-up time, ts Release time,tr
Pin
2, 3 2, 3 2, 3 8 7 7 5 5 5 5 1 1 1 2,3,7 5,7 5,7
Value
Min
1 50 100 60 1.7 VCC VCC 0.3VCC 1.2 -1.2 VCC 0.4VCC 10 3
Conditions
Max Units
GHz MHz V/s mA V V V V mA mA V V A ns ns ns Input = 200-1200mVp-p Input = 400-1200mVp-p Output unloaded, VCC=5.5V
0 VCC-1.4 0.7VCC 0 0.6 -0.6 0.6VCC 0 -10 3 3
At driver end of 3k resistor At driver end of 3k resistor Via 3k resistor to VCC Via 3k resistor to VCC
See note 1 and Fig. 3a See note 2 and Fig. 3b
Notes: 1. The set-up time ts is defined as the minimum time that can elapse between LH transition of the modulus control input and the next LH output transition to ensure that the / 16 (32) mode is obtained. 2. The release time tr is defined as the minimum time that can elapse between HL transition of the modulus control input and the next LH output transition to ensure that the / 17 (33) mode is obtained.
2
SP8782A & B
Modulus control input 0 1
Ratio select input 0 1 /17 /16 /33 /32
Table 1 Truth table for control inputs
CLOCK INPUT
t s
MODULUS CONTROL INPUT DON'T CARE
t s
DON'T CARE
9 (17) OUTPUT 8 (16)
8 (16) 8 (16) DIVIDE-BY-16 (32) MODE ESTABLISHED
Fig. 3a Setting divide-by-16 Figure 3a Setting divide - by - 16 (32 mode) (32) mode
CLOCK INPUT
t r
MODULUS CONTROL INPUT DON'T CARE
t r
DON'T CARE
8 (16) OUTPUT 8 (16)
9 (17) EXTRA PULSE 8 (16)
DIVIDE-BY-17 (33) MODE ESTABLISHED
Figure 3b Setting divide - by - 17 (33 mode)
Figure 3 Timing diagrams
3
SP8782A & B
1600 1400
INPUT AMPLITUDE (mV p-p)
1200 1000
* Tested as specified
800 600 400 200 0
GUARANTEED OPERATING WINDOW
*
in table of speci *Tested as Electrical Characteristics in table of E Characteristi
0
200 400 INPUT FREQUENCY (MHz)
600
800
Figure 4 Typical input characteristics
RATIO SELECT 1 6 8 V CC 10n
MODULUS CONTROL INPUT CLOCK INPUT
3k
5 7 OUTPUT
1n 2
NOTES 1. Pin 6 is grounded to improve isolation between the output and the NOTES modulus control input. 1n 1. 2.The 6 is grounded onimprove Pin 3k resistor pin5 reduces to the amplitude the moduluscontrol of isolation minimise radiation. signal to between the output and the modulus control input 2. The 3k resistor on pin 5 reduces the amplitude of the modulus control signal to minimise radiation
DIVIDE DIVIDE BY BY 16/17 16/17 OR 32/33 OR 32/33
3
4 V EE
Figure 5 Typical application showing interfacing
4
SP8782A & B
j1 j 0.5 j2
j 0.2
1100
j5
0
0.2
0.5
1000
1
2
5
800
200
2 j5
2 j 0.2
600
400
2 j 0.5 2 j1
2 j2
Figure 6 Typical input impedance. Test conditions: supply voltage =5V, ambient temperature =25C, frequencies in MHz, impedances normalised to 50
5
http://www.mitelsemi.com
World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581
Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively "Mitel") is believed to be reliable. However, Mitel assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Mitel or licensed from third parties by Mitel, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Mitel, or non-Mitel furnished goods or services may infringe patents or other intellectual property rights owned by Mitel. This publication is issued to provide information only and (unless agreed by Mitel in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Mitel without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Mitel's conditions of sale which are available on request.
M Mitel (design) and ST-BUS are registered trademarks of MITEL Corporation Mitel Semiconductor is an ISO 9001 Registered Company Copyright 1999 MITEL Corporation All Rights Reserved Printed in CANADA TECHNICAL DOCUMENTATION - NOT FOR RESALE

▲Up To Search▲

Price & Availability of SP8782

	To Download SP8782 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .