Product Identification System

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Examples
Table . AT28C256 Ordering Information
Ordering CodeStandard Military Drawing Number (SMD#)Package NumbertACC(ns)Operating Range
AT28C256-15DM/8835962‑88525 06 XA28D6150

Military/883C Class B,

Fully Compliant

(-55°C to 125°C)

AT28C256-15DM/883-8155962‑88525 14 XA(1)
AT28C256-15FM/8835962‑88525 06 ZA28F
AT28C256-15FM/883-8155962‑88525 14 ZA(1)
AT28C256-15LM/8835962‑88525 06 YA32L
AT28C256-15LM/883-8155962‑88525 14 YA(1)
AT28C256-15UM/8835962‑88525 06 UA28U
AT28C256-15UM/883-8155962‑88525 14 UA(1)
AT28C256-20DM/8835962‑88525 04 XA28D6200
AT28C256-20DM/883-8155962‑88525 12 XA(1)
AT28C256-20FM/8835962‑88525 04 ZA28F
AT28C256-20FM/883-8155962‑88525 12 ZA(1)
AT28C256-20LM/8835962‑88525 04 YA32L
AT28C256-20LM/883-8155962‑88525 12 YA(1)
AT28C256-20UM/8835962‑88525 04 UA28U
AT28C256-20UM/883-8155962‑88525 12 UA(1)
AT28C256-25DM/8835962‑88525 03 XA28D6250
AT28C256-25DM/883-8155962‑88525 11 XA(1)
AT28C256-25FM/8835962‑88525 03 ZA28F
AT28C256-25FM/883-8155962‑88525 11 ZA(1)
AT28C256-25LM/8835962‑88525 03 YA32L
AT28C256-25LM/883-8155962‑88525 11 YA(1)
AT28C256-25UM/8835962‑88525 03 UA28U
AT28C256-25UM/883-8155962‑88525 11 UA(1)
AT28C256-WMNoneDie SalesNote 2
AT28C256-DWFMNoneWafer SalesNote 2
Note:
  1. Where two DESC numbers apply to the ordering code, utilize SL815 to receive devices marked with the noted DESC dual marked and the AT28C256 number.
  2. Contact Microchip Sales for Die and Wafer sales
Table . AT28C256E Ordering Information
Ordering CodeStandard Military Drawing Number (SMD#)Package NumbertACC(ns)Operating Range
AT28C256E‑15DM/8835962‑88525 08 XA28D6150

Military/883C Class B,

Fully Compliant

(-55°C to 125°C)

AT28C256E‑15DM/883‑8155962‑88525 16 XA(1)
AT28C256E‑15FM/8835962‑88525 08 ZA28F
AT28C256E‑15FM/883‑8155962‑88525 16 ZA(1)
AT28C256E‑15LM/8835962‑88525 08 YA32L
AT28C256E‑15LM/883‑8155962‑88525 16 YA(1)
AT28C256E‑15UM/8835962‑88525 08 UA28U
AT28C256E‑15UM/883‑8155962‑88525 16 UA(1)
AT28C256E‑20DM/883None28D6200
AT28C256E‑20FM/883None28F
AT28C256E‑20LM/883None32L
AT28C256E‑20UM/883None28U
AT28C256E‑25DM/8835962‑88525 05 XA28D6250
AT28C256E‑25DM/883‑8155962‑88525 13 XA(1)
AT28C256E‑25FM/8835962‑88525 05 ZA28F
AT28C256E‑25FM/883‑8155962‑88525 13 ZA(1)
AT28C256E‑25LM/8835962‑88525 05 YA32L
AT28C256E‑25LM/883‑8155962‑88525 13 YA(1)
AT28C256E‑25UM/8835962‑88525 05 UA28U
AT28C256E‑25UM/883‑8155962‑88525 13 UA(1)
Note:
  1. Where two DESC numbers apply to the ordering code, utilize SL815 to receive devices marked with the noted DESC dual marked and the AT28C256 number.
Table . AT28C256F Ordering Information
Ordering CodeStandard Military Drawing Number (SMD#)Package NumbertACC(ns)Operating Range
AT28C256F‑15DM/8835962‑88525 07 XA28D6150

Military/883C Class B,

Fully Compliant

(-55°C to 125°C)

AT28C256F‑15DM/883‑8155962‑88525 15 XA(3)
AT28C256F‑15FM/8835962‑88525 07 ZA28F
AT28C256F‑15FM/883‑8155962‑88525 15 ZA(3)
AT28C256F‑15LM/8835962‑88525 07 YA32L
AT28C256F‑15LM/883‑8155962‑88525 15 YA(3)
AT28C256F‑15UM/8835962‑88525 07 UA28U
AT28C256F‑15UM/883‑8155962‑88525 15 UA(3)
Note:
  1. Electrical specifications for these speeds are defined by Standard Microcircuit Drawing 5962-88525.
  2. SMD specifies Software Data Protection feature for device type, although Microchip product supplied to every device type in the SMD is 100% tested to this feature.
  3. Where two DESC numbers apply to the ordering code, utilize SL815 to receive devices marked with the noted DESC dual marked and the AT28C256 number.
Package Types
28D628-Lead, 0.600" Wide, Non-Windowed, Ceramic Dual Inline (Cerdip)
28F28-Lead, Non-Windowed, Ceramic Bottom-Brazed Flat Package (Flatpack)
32L32-Pad, Non-Windowed, Ceramic Leadless Chip Carrier (LCC)
28U28-Pin, Ceramic Pin Grid Array (PGA)
WMDiced Die Military
DWFMDie in Wafer Form Military
Options
BlankStandard Device: Endurance = 10K Write Cycles; Write Time 10 ms
EHigh Endurance Option: Endurance = 100K Write Cycles
FFast Write Option: Write Time = 3 ms