M27C256B-12F6 STMicroelectronics, M27C256B-12F6 Datasheet - Page 2

• Manufacturer Part Number: M27C256B-12F6
• Description: IC EPROM 256KBIT 120NS 28CDIP
• Manufacturer: STMicroelectronics

Specifications of M27C256B-12F6

• Format - Memory: EPROMs
• Memory Type: UV EPROM
• Memory Size: 256K (32K x 8)
• Speed: 120ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-CDIP (0.600", 15.24mm) Window
• Capacitance, Input: 6 pF
• Capacitance, Output: 12 pF
• Current, Input, Leakage: ±10 μA (Read)
• Current, Operating: 30 mA (Read)
• Current, Output, Leakage: ±10 μA (Read)
• Current, Supply: 30 mA
• Density: 256K
• Organization: 32K×8
• Package Type: FDIP28W
• Temperature, Operating: -40 to +85 °C
• Temperature, Operating, Maximum: 85 °C
• Temperature, Operating, Minimum: -40 °C
• Time, Access: 120 ns
• Time, Fall: ≤20 ns
• Time, Programmable: 100 μA
• Time, Rise: ≤20 ns
• Voltage, Input, High: 6 V (Read)
• Voltage, Input, High Level: 2 V (Min.)
• Voltage, Input, Low: 0.8 V (Read)
• Voltage, Input, Low Level: 0.8 V (Typ.)
• Voltage, Output, High: 4.3 V (Read)
• Voltage, Output, Low: 0.4 V (Read)
• Voltage, Programmable: 12.75 V ± 0.25 V
• Voltage, Supply: 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1647-5

Contents
Contents
1
2
3
4
5
6
7
2/24
Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Device operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Read mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Two-line output control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
System considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PRESTO II programming algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Program inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Program Verify . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electronic signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Erasure operation (applies for UV EPROM) . . . . . . . . . . . . . . . . . . . . . . . 11
M27C256B