Type 1

Type 1

AtmelUnited States

AT49F040

Memory32J

IC MEM FLASH 4MB 55NS 32TSOP

AT49F040 is a 4Mbit (512K x 8) 5V Flash memory with 55ns to 120ns access times, available in TSOP, DIP, and PLCC packages, featuring Boot Block protection.Checked against the datasheet

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Technical parameters

Key specs

Memory typeFlash
InterfaceParallel
Supply voltage≥ 5 V
Clock frequency5 MHzMax

Datasheet-verified parameters

22 items
ParameterValue and test conditionsSource
Memory TypeFlash Memory
Capacity4 megabits (524,288 words by 8 bits)
Bus InterfaceParallel (8-bit Data, 19-bit Address)
Supply Voltage5V (Single-voltage Operation)
Clock Frequency5 MHz (for Active Current test condition)
Package32J (TSOP), 32P6 (DIP), 32T (PLCC)
Operating TemperatureCommercial: 0°C to 70°C; Industrial: -40°C to 85°C
GradeCommercial, Industrial
Read Access Time55 ns, 70 ns, 90 ns, 120 ns
Active CurrentMax 50 mA (f=5 MHz; I_OUT=0 mA)
CMOS Standby CurrentMax 100 μA (Commercial); Max 300 μA (Industrial)
TTL Standby CurrentMax 3 mA (CE=2.0V to VCC)
Input Low VoltageMax 0.8 V
Input High VoltageMin 2.0 V
Output Low VoltageMax 0.45 V (I_OL=2.1 mA)
Output High VoltageMin 2.4 V (I_OH=-400 μA)
Absolute Maximum Rating - Temperature Under Bias-55°C to +125°C
Absolute Maximum Rating - Storage Temperature-65°C to +150°C
Absolute Maximum Rating - Input Voltage-0.6V to +6.25V
Erase Cycle Time10 seconds
Programming Cycle Time50 µs/Byte
Write CyclesTypical 10,000
All parameters (9)ExpandCollapse
Power
VCC Active Current50 mA (Max)
VCC Standby Current CMOS100 µA (Max)
Environment and package
Memory Size4 megabits
PackageTSOP
Temperature Under Bias-55°C to +125°C
Other
Access Time55 ns
Byte Programming Time50 µs/Byte
Erase Cycle Time10 seconds
Organization524,288 words by 8 bits

Pinout and package

Type 1
Type 1
Package: 32J (TSOP), 32P6 (DIP), 32T (PLCC)
PinNameFunctionSource
1A11(Address)
2A9(Address)
3A8(Address)
4A13(Address)
5A14(Address)
6A17(Address)
7WE(Write Enable)
8VCC(Power Supply)
9A18(Address)
10A16(Address)
11A15(Address)
12A12(Address)
13A7(Address)
14A6(Address)
15A5(Address)
16A4(Address)
17A3(Address)
18A2(Address)
19A1(Address)
20A0(Address)
21I/O0(Data Input/Output)
22I/O1(Data Input/Output)
23I/O2(Data Input/Output)
24GND(Ground)
25I/O3(Data Input/Output)
26I/O4(Data Input/Output)
27I/O5(Data Input/Output)
28I/O6(Data Input/Output)
29I/O7(Data Input/Output)
30CE(Chip Enable)
31A10(Address)
32OE(Output Enable)

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DatasheetDatasheet · 266.6 KB · 2026-11-04
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