|Category||Power Management => Power Distribution/Switches => Hot-Swap Controllers|
|Description||General Purpose Hot Swap Controller|
|Company||Summit Microelectronics, Inc.|
|Datasheet||Download S39421 datasheet
FEATURES Full Voltage Control for Hot Swap Applications Card Insertion Detection Platform Voltage Detection Card Voltage Sequencing 5 Volt, 12 Volt and 3.3 Volt 12 Volt FET Enable Outputs Allows use of Low On-resistance N-Channel FETS Card Reset Generation Based on Out of Spec Voltages Host Reset Programmable Slew Rate Control [250V/Sec Default Rate] Supports 5 Volt, 3.3 Volt and Mixed Voltage Cards Integrated 1K Bit E2PROM Memory Data DownloadTM Mode [Simplifies Downloading of Configuration Memory into Interface ASIC or MCU]
DESCRIPTION The is a fully integrated hot swap controller intended for use on add-in cards that may be inserted into or removed from powered-on host platforms. The S39421 performs a variety of tasks starting with the validation of proper card insertion and the presence of "in-spec" voltages at the host platform interface. Once power is switched on, the S39421 continues to monitor the back-end power to the add-in card and the host power supply. If either the or 3.3V supplies drop below Vtrip the S39421 will immediately assert the RESET outputs and power-down the add-in card. In addition to the power control for the add-in card, the S39421 provides status signals that can be employed by the host and for the control of bus interface components. The on board E2PROM can be used as configuration memory for the individual card or as general purpose memory. The proprietary DataDownload mode provides a more direct interface to the E2PROM for simplified access by the add-in card's controller or ASIC.
© SUMMIT MICROELECTRONICS, Inc. 2001 300 Orchard City Drive, Suite 131 Campbell, CA 95008 Telephone 408-378-6461 Fax 408-378-6586 www.summitmicro.com Characteristics subject to change without notice 9.1 1/23/01
PIN CONFIGURATION Symbol VCC12 DRVREN ISLEW VSEL PND2 PND1 GND Pin Description 12 Volt Input High Side Driver Enable (L) Slew Rate Control Voltage Select Data Download Enable Microwire Chip Select Microwire Serial Clock Microwire Data In Microwire Data Out Pin Detect 2 (Active Low) Pin Detect 1 (Active Low) Ground Card Voltage Valid Signals Valid (Active Low) Host Power Up Enable Host Reset (Active Low) RESET(Active Low) RESET Card's 3 Volt Monitor Input 3 Volt Gate Output 3 Volt Input Card's 5 Volt Monitor Input 5 Volt Gate Output 5 Volt InputVCC12 DRVREN ISLEW VSEL PND2 PND1 GND VGATE3 CARD_3V RESET HST_RST HST_PWR SGNL_VLD CARD_V_VLD
ABSOLUTE MAXIMUM RATINGS* Temperature Under Bias Storage Temperature Voltage on : DRVREN 7V 12V VCC +.7V VCC 100mA 300°C COMMENT Stresses listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions outside those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.
CARD_5V CARD_3V SGNL_VLD, CARD_V_VLD & RESET All Others Output Short Circuit Current Lead Solder Temperature (10 secs)
DC OPERATING CHARACTERISTICS (Over Recommended Operating Conditions) Symbol ICC2 ICC3 VTRIP Parameter Power Supply Current Power Supply Current Power Supply Current VTRIP Sense Levels Low to High ConditionsResets Active, VGATES Ramping Quiesent - Resets released, VGATES On
VTRHST ILI ILO VIL VIH VOL VOH VOLRS VOHRS Trip Point Hysteresis Input Leakage Current Output Leakage Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage RESET Output Low Voltage RESET Output High Voltage
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