MK1491-06 RENESAS | Alldatasheet
Document overview
- Manufacturer or author: mamiller
- PDF pages: 13
Technical content
Features
- Packaged in 28-pin SOIC or in 28-pin SSOP
- Pb (lead) free, RoHS compliant
- Provides all critical timing for the AMD Geode companion chip
- Four PCI clocks
- Selectable PCIF on up to 2 outputs
- Early PCI clock selectability
- Up to 4 Reference clocks
- 48 MHz USB and 24MHz SIO support
- AC97 audio clock
- Multiple power down modes
- Low EMI Enable pin reduces EMI radiation on PCI clocks atented)
- Operating voltage of 3.3 V ±5%
- Available in commercial (0 to +70°C) and industrial 40°C to +85°C) temperature ranges Block Diagram Crystal Oscillator Fixed Clocks Audio Clock PCI Clocks MUX PCI Frequency Select Low EMI Enable PCIF Function Enable Early PCI Enable SLOW# PCISTP# PWRDWN# Audio Select VDD GND PCI EPCI/PCI
48 MHz
14.318 MHz or
24 MHz
14.318 MHz
16.394 MHz or
24.576 MHz or
49.152 MHz
14.31818 MHz
14.3M/24M Select
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 2 MK1491-06 REV M 060914 Pin Assignment Early PCI Control Table EMI Control Spread direction is DOWN. PCI Frequency Select Table 24M/14.3M Frequency Select Table PCIF Enable Control PCIF continues to run in PCI STOP mode. See table on page 4. AC97 Audio Frequency Select Pin Descriptions EPCI# PCI (Pin 22) 0 1 ns early 1N o r m a l LE# PCI Low EMI 0O N 1O F F GND 14.3M (SEL AUDIO) VDD 48M (LE#) SLOW# GND VDD 24M/14.3M VDD FS GND PWRDWN# SEL24 PCISTP# VDD PCI (EPCI#) 14.3M (TS) 14.3M GND PCI XO GND PCI VDD VDD XI PCI AC97 AUDIO (PEN) TS FS PCI 0 0 Tristate all clocks
01 R e s e r v e d
M 1 33.3 MHz 1 0 25 MHz 1 1 37.5 MHz SEL24 24M/14.3M 0 14.31818 MHz 1 24.0 MHz PEN Pin 25 Pin 24 0P C I P C I MP C I P C I F
1 PCIF PCIF
0 16.9344 MHz M 24.576 MHz 1 49.152 MHz Pin Number Pin Name Pin Type Pin Description 1, 9, 14 VDD P Connect to +3.3 V. Must be same voltage on all pins. 2 XI I Crystal connection. Connect to a 14.31818 MHz crystal or input clock. 3 XO O Crystal connection. Connect to a 14.31818 MHz crystal, or leave unconnected for clock. 4, 7, 11, 17, 23 GND P Connect to Ground. 5 14.3M (TS) TI/O 14.318 MHz output. Input control for all clocks per table above. 6 14.3M O 14.318 MHz buffered reference clock output.
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 3 MK1491-06 REV M 060914 KEY: I = Input TI = Tri-level O = Output P = Power supply connection (T)I/O = Input on power up, becomes an Output after 10 ms Weak internal pull-up resistors are present on SEL24, EPCI#, FS, LE#, PCISTP#, and SLOW#. These pins should be tied to VDD or GND, and not be left floating. Internal resistors on PEN, SEL AUDIO, and TS pull to mid-level (M). 8 14.3M (SEL AUDIO) TI/O 14.318 MHz output and audio frequency select input per table above. 10 SLOW# I PCI normal or slow mode select input per table on page 4. 12 FS I Frequency Select for PCI clocks per table above. 13 SEL24 I Fixed frequency select input per table above. Selects frequency on pin 19. 15 PWRDWN# I Power down control; defined in table on page 4. 16 PCISTP# I PCI Stop power down control; defined in table on page 4. 18, 20, 26 VDD P Connect to +3.3 V. Must be same voltage on all pins. 19 24M/14.3M O Fixed frequency clock output per table above. 21 48 (LE#) I/O Fixed frequency clock output and low EMI (spread spectrum) enable input per table above. 22 PCI (EPCI#) I/O PCI Output clock that can be early. Input control for Early PCI per table above. 24 PCI O PCI Output clock. PCI/PCIF control set by PEN per table above. 25 PCI O PCI Output clock. PCI/PCIF control set by PEN per table above. 27 PCI O PCI Output clock.
28 AC97 AUDIO
(PEN) TI/O Audio clock output and PCIF Function Enable per table above. Pin Number Pin Name Pin Type Pin Description
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 4 MK1491-06 REV M 060914 Power Down Control Table Key: 1 = connected to VDD, 0 = connected to ground, X = any valid logic level, combination inputs/outputs should be connected to VDD or ground through a 10 k resistor as shown below. Power-on Default Conditions PCISTP# PWRDWN# SLOW# MODE PCI PCIF 24/14.3 14.3 Description X 0 X Power down LOW LOW LOW LOW All outputs low. PLL ’s and oscillators off. 0 1 X PCI STOP LOW ON ON ON PCI clocks synchronously enter and leave low state. 1 1 X ON ON ON ON ON All clocks on. Pin # Function Default Condition 5 TS M All outputs enabled. 8 SEL AUDIO M Audio clock (pin 28) set to 24.576 MHz 10 SLOW# 1 PCI clocks set to 33.3 MHz. Refer to Power Down Control Table above. 12 FS 1 PCI frequency = 33.3 MHz. 13 SEL 24 1 24M/14.3M (pin 19) set to 24 MHz. 15 PWRDWN# 1 All clocks running. 16 PCISTP# 1 PCI clocks running.
21 LE# 1 Low EMI function OFF
22 EPCI# 1 Pin 22 set to normal PCI signal (not early). 28 PEN M PCI (pin 25) set to PCI clock (33.33 MHz). PCI (pin 24) set to PCIF clock (33.33 MHz).
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 5 MK1491-06 REV M 060914 External Components The MK1491-06 requires some inexpensive external components for proper operation. Decoupling capacitors of 0.1µF should be connected on each VDD pin to ground, as close to the MK1491-06 as possible. A series termination resistor of 33may be used for each clock output. See the discussion below for other external resistors required for proper I/O operation. The 14.3 MHz oscillator has internal caps that provide the proper load for a parallel resonant crystal with CL=18 pF . For tuning with other values of C L, the formula 2*(CL-18) gives the value of each capacitor that should be connected between X1 and ground and X2 and ground. I/O Structure The MK1491-06 provides more functionality in a 28-pin package by using a unique I/O technique. The device checks the status of all I/O pins during power-up and at exit from the Power Down state. This status (pulled high, low, or mid-level) then determines the frequency selections and power down modes (see the tables on pages 2 and 4). Within 10ms after power up, the inputs change to outputs and the clocks start up. In the diagrams to the right, the 33 resistors are the normal output termination resistors. The 10k resistor pulls low to generate a logic zero. Weak internal pull-up resistors are present on SEL24, EPCI#, FS, LE#, PCISTP#, and SLOW#. These pins should be connected directly to VDD or GND if not under active control. Internal resistors on PEN, SEL AUDIO, and TS pull to a mid-level (M). *Note: Do not use a TTL load. This will overcome the 10 k pull-down and force the input to a logic 1. 33 To load* 10 k I/O For select = 0 (low) Do not stuff for “1” selection
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 6 MK1491-06 REV M 060914 Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK1491-06. 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 Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70°C or -40 to +85C Item Rating Supply Voltage, VDD 7 V All Inputs and Outputs -0.5 V to VDD+0.5 V Storage Temperature -65 to +150 C Junction Temperature 125 C Soldering Temperature 260 C Parameter Min. Typ. Max. Units Ambient Operating Temperature (commercial) 0 +70 C Ambient Operating Temperature (industrial) -40 +85 C Power Supply Voltage (measured in respect to GND) +3.15 +3.3 +3.45 V Parameter Symbol Conditions Min. Typ. Max. Units Operating Voltage VDD 3.15 3.3 3.45 V Input High Voltage V IH 2V Input Mid-level Voltage V IM 1.2 1.4 1.6 V Input Low Voltage V IL 0.8 V Output High Voltage V OH IOH = -8 mA 2.4 V Output Low Voltage V OL IOL = 8 mA 0.4 V Output High Voltage V OH IOH = -8 mA VDD-0.4 V Operating Supply Current IDD 33 MHz, no load 30 mA Power Down Mode Supply Current 15 µA Short Circuit Current, Single Output Driver VDD = 3.3 V ±60 mA Input Capacitance C IN 7p F
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 7 MK1491-06 REV M 060914 Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70°C or -40 to +85 C Thermal Characteristics Parameter Symbol Conditions Min. Typ. Max. Units Input Frequency F IN 14.31818 MHz Output Clock Rise Time t OR 20% to 80% 1.5 ns Output Clock Fall Time t OF 80% to 20% 1.5 ns Output Clock Duty Cycle, all MHz Clocks tOD At 1.5 V 45 49 to 51 55 % PCI Output to Output Skew Rising edges at 1.5 V 500 ps Skew of EPCI with respect to PCI 1n s Cycle-to-Cycle Jitter, PCI clocks 250 ps EMI Reduction, peaks of 5th - 19th odd harmonics 33.3 MHz PCI Clock 6 11 dB Power-up Time, PWRDWN# High to all Clocks Stable 82 0 m s Power-on Time, applied VDD to all Clocks Stable 12 25 ms Parameter Symbol Conditions Min. Typ. Max. Units Thermal Resistance Junction to Ambient JA Still air 100 C/W JA 1 m/s air flow 80 C/W JA 3 m/s air flow 67 C/W Thermal Resistance Junction to Case JC 60 C/W
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 8 MK1491-06 REV M 060914 Marking Diagrams Notes: 1. LOT is the lot code. 2. YYWW is the last two digits of the year, and the week number that the part was assembled. 3. Bottom marking: country of origin. MK1491-06RLF LOT YYWW MK1491-06RLF MK1491-06RILF LOT YYWW MK1491-06RILF LOT YYWW MK1491-06SLF MK1491-06SLF ICS
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 9 MK1491-06 REV M 060914 Package Outline and Package Dimensions (28-pin SOIC, 150 mil Body) Package dimensions are kept current with JEDEC Publication No. 95, MO-153 h x 45° L C SEATING PLANE B A e .10 (.004) INDEX AREA 1 2 N D E H Millimeters Inches Symbol Min Max Min Max A 2.65 0.104 A1 0.10 .0040 B 0.33 0.51 .013 .020 C 0.18 0.32 .007 .013 D 17.70 18.40 .697 .724 E 7.40 7.60 .291 .299 e 1.27 Basic 0.050 Basic H 10.00 10.65 .394 .419 h 0.25 0.75 .010 .029 L 0.40 1.27 .016 .050
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 10 MK1491-06 REV M 060914 Package Outline and Package Dimensions (28-pin SSOP, 150 mil Body, 0.025 mm Pitch) Package dimensions are kept current with JEDEC Publication No. 95, MO-153
Ordering Information
“LF” denotes Pb (lead) free package, 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 MK1491-06RLF see page 8 Tubes 28-pin SSOP 0 to +70 C MK1491-06RLFTR Tape and Reel 28-pin SSOP 0 to +70 C MK1491-06RILF Tubes 28-pin SSOP -40 to +85 C MK1491-06RILFTR Tape and Reel 28-pin SSOP -40 to +85 C MK1491-06SLF Tubes 28-pin SOIC 0 to +70 C MK1491-06SLFTR Tape and Reel 28-pin SOIC 0 to +70 C INDEX AREA 1 2 D E1 E SEATING PLANE A AA e - C - b aaa C c L Millimeters Inches Symbol Min Max Min Max A 1 . 3 51 . 7 5. 0 5 3. 0 6 9 A1 0.10 0.25 .0040 .010 A2 -- 1.50 -- .059 b 0 . 2 00 . 3 0. 0 0 8. 0 1 2 C 0 . 1 80 . 2 5. 0 0 7. 0 1 0 D 9.80 10.00 .386 .394 E 5 . 8 06 . 2 0. 2 2 8. 2 4 4 E1 3.80 4.00 .150 .157 e 0.635 Basic 0.025 Basic L 0 . 4 01 . 2 7. 0 1 6. 0 5 0
AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER IDT® AMD GEODE™ CLOCK SOURCE 11 MK1491-06 REV M 060914
Revision History
Rev. Date Originator Description of Change M 06/09/14 RDW Added I-temp throughout datasheet.
© 2014 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 a nd 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 MK1491-06 AMD GEODE™ CLOCK SOURCE CLOCK SYNTHESIZER
© 202 Renesas Electronics Corporation. All rights reserved. IMPORTANT NOTICE AND DISCLAIMER RENESAS ELECTRONICS CORPORATION AND ITS SUBSIDIARIES (“RENESAS”) PROVIDES TECHNICAL SPECIFICATIONS AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. These resources are intended for developers skilled in the art designing with Renesas products. You are solely responsible for (1) selecting the appropriate products for your application, (2) designing, validating, and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, or other requirements. These resources are subject to change without notice. Renesas grants you permission to use these resources only for development of an application that uses Renesas products. Other reproduction or use of these resources is strictly prohibited. No license is granted to any other Renesas intellectual property or to any third party intellectual property. Renesas disclaims responsibility for, and you will fully indemnify Renesas and its representatives against, any claims, damages, costs, losses, or liabilities arising out of your use of these resources. Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use o any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products. ('LVFODLPHURev.1.0 Mar 2020) Corporate Headquarters Contact Information TOYOSU FORESIA, 3-2-24 Toyosu, For further information on a product, technology, the most Koto-ku, Tokyo 135-0061, Japan up-to-date version of a document, or your nearest sales www.renesas.com office, please visit: www.renesas.com/contact/ Trademarks Renesas and the Renesas logo are trademarks of Renesas Electronics Corporation. All trademarks and registered trademarks are the property of their respective owners.