MK1491-06RLFTR

MK149106 ICST | Alldatasheet

Document overview

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• PDF pages: 10

Technical content

Features

• Packaged in 28-pin SOIC or in 28-pin SSOP
• Available in Pb (lead) free
• 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 (patented)
• Operating voltage of 3.3 V ±5% 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 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 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 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 10 2 5 M H z 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 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 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 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 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 kΩ 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 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 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 33Ω may 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 33Ω resistors are the normal output termination resistors. The 10kΩ 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 kΩ pull-down and force the input to a logic 1. To load* 10 k I/O For select = 0 (low) Do not stuff for “1” selection

AMD Geode™ Clock Source Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the MK1491-06. These ratings, which are standard values for ICS 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 Item Rating Supply Voltage, VDD 7 V All Inputs and Outputs -0.5 V to VDD+0.5 V Ambient Operating Temperature 0 to +70 °C Storage Temperature -65 to +150 °C Junction Temperature 125 °C Soldering Temperature 260 °C Parameter Min. Typ. Max. Units Ambient Operating Temperature 0 +70 °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 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70° 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 θJA Still air 100 °C/W θJA 1 m/s air flow 80 °C/W θJA 3 m/s air flow 67 °C/W Thermal Resistance Junction to Case θJC 60 °C/W

AMD Geode™ Clock Source Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 Marking Diagram Notes: 2. YYWW is the last two digits of the year, and the week number that the part was assembled. 28 15 YYWW MK1491-06R ICS

AMD Geode™ Clock Source Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 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° α 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 α 0° 8° 0° 8°

AMD Geode™ Clock Source Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com MK1491-06 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. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS) 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. Part / Order Number Marking Shipping Packaging Package Temperature MK1491-06R MK1491-06R Tubes 28-pin SSOP 0 to +70 °C MK1491-06RTR MK1491-06R Tape and Reel 28-pin SSOP 0 to +70 °C MK1491-06RLF MK1491-06RLF Tubes 28-pin SSOP 0 to +70 °C MK1491-06RLFTR MK1491-06RLF Tape and Reel 28-pin SSOP 0 to +70 °C MK1491-06S MK1491-06S Tubes 28-pin SOIC 0 to +70 °C MK1491-06STR MK1491-06S Tape and Reel 28-pin SOIC 0 to +70 °C MK1491-06SLF MK1491-06SLF Tubes 28-pin SOIC 0 to +70 °C MK1491-06SLFTR MK1491-06SLF 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 α 0° 8° 0° 8°