Industry's First IEEE 1394/FireWire-Compliant Hot-Swap Controllers
The MAX5943 is a fully integrated power-management IC for FireWire® applications. This device controls two external power n-channel MOSFETs to regulate current from the input power supply to the load and performs low-voltage-drop, power-supply ORing. The MAX5943 operates over a 7.5V to 37V input range and provides inrush and output current limit in addition to a diode ORing function suitable for FireWire applications. The MAX5943 FireWire/IEEE 1394™ protective circuit (Figure 12 of the full data sheet) is UL® recognized. The MAX5943 allows the safe insertion and removal of FireWire peripherals into a live FireWire port by providing inrush current control and an output current-limiting function. The ORing feature provides a very efficient way to protect the FireWire port when connected to another FireWire peripheral that sources a higher voltage. By turning off both external MOSFETS, the MAX5943 provides a true bidirectional load disconnect. A low-current shutdown mode disables the MAX5943, resulting in less than 10µA supply current. A pin-selectable input allows latched or autoretry fault management after a fault. The MAX5943A features a current-limit function that actively limits the current drawn by the load with a programmable timeout. The MAX5943B–MAX5943E do not actively limit the load current but provide a circuit-breaker function. See the Selector Guide in the full data sheet for the default and programmable circuit-breaker timeouts. The MAX5943 operates over the -40°C to +85°C extended temperature range and is available in a 16-pin QSOP package.
title | Download file |
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MAX5943 Data Sheet | MAX5943.pdf |
Part Number | VIN (V) | VIN (V) | Circuit Breaker/ Current Limit | Circuit Breaker/Current Limit Threshold (mV) | Fault Condition Control | Channels | Positive/Negative Rail | Features | Package/Pins | Budgetary Price |
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min | max | See Notes | ||||||||
MAX5943 | 7.5 | 37 | Circuit Breaker Current Limit | Adjustable | Latched Off Periodic Retry | 1 | Positive | Single Firewire Controller | QSOP/16 | $1.97 @1k |
Part Number | Reverse Current Protect. | Under Voltage Protect | Charge Pump Cap. | Soft Start | Enable | Fault Indicator | Package/Pins | Oper. Temp. (°C) | Budgetary Price |
---|---|---|---|---|---|---|---|---|---|
See Notes | |||||||||
MAX5943 | Yes | Yes | No | Yes | Yes | Yes | QSOP/16 | -40 to +85 | $1.97 @1k |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
---|---|---|---|---|---|
MAX5943AEEE | No Longer Available | MAX5943AEEE+ | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | No |
MAX5943AEEE+ | Active | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
MAX5943AEEE+T | Active | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
MAX5943AEEE-T | No Longer Available | MAX5943AEEE+T | QSOP;16 pin | -40°C to +85°C | See data sheet |
MAX5943BEEE | No Longer Available | MAX5943BEEE+ | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | No |
MAX5943BEEE+ | Active | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
MAX5943BEEE+T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet | |
MAX5943BEEE-T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet | |
MAX5943CEEE | No Longer Available | MAX5943CEEE+ | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | No |
MAX5943CEEE+ | Active | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX5943CEEE+T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet | |
MAX5943CEEE-T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet | |
MAX5943DEEE | No Longer Available | MAX5943DEEE+ | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | No |
MAX5943DEEE+ | Active | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
MAX5943DEEE+T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet | |
MAX5943DEEE-T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet | |
MAX5943EEEE | No Longer Available | MAX5943EEEE+ | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | No |
MAX5943EEEE+ | Active | QSOP,;16 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
MAX5943EEEE+T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet | |
MAX5943EEEE-T | No Longer Available | QSOP;16 pin | -40°C to +85°C | See data sheet |