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Manufacturer Part #


SST39LF Series 4 Mbit 256 K x 16 3.3 V Multi-Purpose Flash - TSOP-48

ECAD Model:
Mfr. Name: Microchip
Standard Pkg:
Product Variant Information section
Date Code: 2036
Product Specification Section
Microchip SST39LF400A-55-4C-EKE - Technical Attributes
Attributes Table
Memory Density: 4Mb
Memory Organization: 256 K x 16
Supply Voltage-Nom: 3V to 3.6V
Access Time-Max: 55ns
Package Style:  TSOP-48
Mounting Method: Surface Mount
Features & Applications

NOTE: This SST product is migrating to the preferred Microchip (MCP) part number. All products bearing the Microchip part number are identical in form, fit and function to the products with the legacy SST prefix/logo mark.

The SST39LF400A-55-4C-EKE is a part of SST39LF series Multi-Purpose Flash. It has an standard commercial operating temperature ranging from 0°C to +70°C, it comes in a TSOP-48 package.

The SST39LF400A is a 256 K x16 CMOS Multi-Purpose Flash (MPF) manufactured with SST proprietary, high performance CMOS SuperFlash technology. The split-gate cell design and thick oxide tunneling injector attain better reliability and manufacturability compared with alternate approaches.   


  • Organized as 256K x16
  • Single Voltage Read and Write Operations – 3.0-3.6 V for SST39LF400A
  • Superior Reliability – Endurance: 100,000 Cycles (typical) – Greater than 100 years Data Retention
  • Low Power Consumption (typical values at 14 MHz) – Active Current: 9 mA (typical) – Standby Current: 3 μA (typical)
  • Sector-Erase Capability – Uniform 2 KWord sectors
  • Block-Erase Capability – Uniform 32 KWord blocks
  • Fast Read Access Time – 55 ns for SST39LF400A
  • Latched Address and Data
  • Fast Erase and Word-Program – Sector-Erase Time: 18 ms (typical) – Block-Erase Time: 18 ms (typical) – Chip-Erase Time: 70 ms (typical) – Word-Program Time: 14 μs (typical) – Chip Rewrite Time: 4 seconds (typical) for SST39LF400A
  • Automatic Write Timing – Internal VPP Generation
  • End-of-Write Detection – Toggle Bit – Data# Polling
  • CMOS I/O Compatibility
  • JEDEC Standard – Flash EEPROM Pinouts and command sets
  • Packages Available – 48-lead TSOP (12mm x 20mm) – 48-ball TFBGA (6mm x 8mm) – 48-ball WFBGA (4mm x 6mm) – 48-bump XFLGA (4mm x 6mm) – 4 and 8Mbit
  • All non-Pb (lead-free) devices are RoHS compliant
Pricing Section
Global Stock:
On Order:
Factory Stock:Factory Stock:
Factory Lead Time:
4 Weeks
Minimum Order:
Multiple Of:
Web Price
Product Variant Information section