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Product Detailed Parameters
- Description：IC PWR DRVR BIPOLAR 1:32 44PLCC
- Series：-
- Mfr：Allegro MicroSystems
- Package：Tape & Reel (TR)
- Switch Type：Latched Driver
- Number of Outputs：32
- Ratio - Input:Output：1:32
- Output Configuration：High Side
- Output Type：Bipolar
- Interface：Strobe, Serial
- Voltage - Load：60V (Max)
- Voltage - Supply (Vcc/Vdd)：3V ~ 5.5V
- Current - Output (Max)：40mA
- Rds On (Typ)：-
- Input Type：Non-Inverting
- Features：-
- Fault Protection：-
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：44-PLCC (16.59x16.59)
- Package / Case：44-LCC (J-Lead)
- Grade：-
- Qualification：-
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Overview
The A6818KEPTR is a 32-bit serial input latched source driver manufactured by Allegro MicroSystems. It integrates a CMOS shift register, data latches, and control circuitry with bipolar sourcing outputs and PNP active pull-downs. The device features a 44-pin PLCC package (16.59 mm x 16.59 mm). Key electrical parameters include a minimum output breakdown voltage of 60 V and an output current rating of -40 mA. It operates with a logic supply range of 3V to 5.5V and supports a high-speed data-input rate. The component is designed for vacuum-fluorescent display applications.
Feature Summary
- Integrates 32-bit CMOS shift register with accompanying data latches and control circuitry
- Features bipolar sourcing outputs combined with PNP active pull-downs
- Provides controlled output slew rate capability
- Supports operation with 5V logic supply
Applications
- Driving vacuum-fluorescent displays
- Peripheral power driver applications requiring high voltage ratings
- Dot matrix display systems
Procurement Notes
Verify the specific suffix 'KEPTR' against official Allegro documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status as historical records may vary between non-compliant and compliant versions. Ensure the procurement channel provides valid datasheets matching the exact part number to avoid functional mismatches in serial interface designs.
Selection Notes
Select this component when a high-voltage source driver with integrated latching is required for display interfaces. The 60 V breakdown voltage and -40 mA output capability distinguish it from standard low-voltage drivers. Consider the 44-pin PLCC form factor for board space constraints. Verify compatibility with existing serial clock and data lines before integration into the system architecture.
Part Context
The A6818 belongs to Allegro's DABiC-IV family of latch drivers. It serves as an improved replacement for legacy components such as the SN75518N, SN75518NF, UCN5818x, and UCQ5818x series. This lineage indicates its role in upgrading older vacuum-fluorescent display control circuits with enhanced speed and reliability features while maintaining pin-out compatibility where applicable.
Replacement Considerations
Officially documented replacements include SN75518N, SN75518NF, UCN5818x, and UCQ5818x. Verify pin compatibility and electrical parameter margins when substituting these legacy parts. Ensure the replacement maintains the required 60 V output breakdown and -40 mA drive current specifications for the target application.
