EPROM

EPROM stands for erasable programmable read-only memory and is a type of solid-state memory chip. EPROM is a type of non-volatile ROM memory that retains data after the power has been switched off. EPROM ICs are used within circuits to add memory capabilities.

The basic transistor device in an EPROM chip is different from the normal MOS transistor. A floating gate avalanche injection MOS transistor is used. There are two gates to this MOS transistor and one gate is a floating gate, meaning that it has no electrical connection to that gate.

EPROM varies from other types of programmable ROM memory as, when you erase data, the entire memory is removed. EEPROM is another memory chip with erasable data. However, EEPROM chips can erase blocks of data instead of the entire chip only.

Where are EPROM chips used?

  • Computer memory
  • Compact flash
  • USB sticks
  • Microcontrollers

How is EPROM memory erased?

EPROM ICs can be programmed and then erased by using UV light. They feature a transparent quartz window on top of the package. The memory in an EPROM device is erased by applying UV light to the window at the top of the package. General indoor lighting will not contain enough UV light to effect it. However, outdoor light could cause memory to be erased. Therefore many chip windows are protected and covered by a label.

Once the chip is exposed to UV light, the electrons in the floating gate get excited. The high energy that they acquire allows them to overcome the silicon dioxide barrier and move over to the silicon substrate or the control gate. Once they do this you are reducing the threshold voltage. This can take up to 30 minutes, after which the electrons move out from the floating gate and then it is ready for reprogramming.


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กำลังดูสินค้า 1 - 20 รายการจาก 54 รายการ / Viewing 1 - 20 of 54 products
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รายละเอียดสินค้า / Description ราคา / Price Memory Size Organisation Interface Type Maximum Random Access Time Programming Voltage Reprogramming Technique In System Programmability Mounting Type Package Type Pin Count Dimensions Maximum Operating Supply Voltage Maximum Operating Temperature Minimum Operating Supply Voltage
RS Stock No. 127-4051
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C020-55JU
Brand :Microchip
THB130.075
Each: (In a Pack of 2)
Units
2Mbit 256K x 8 bit - 55ns - OTP - Through Hole PLCC 32 14.04 x 11.5 x 3.17mm - +85 °C -
RS Stock No. 127-6560
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C4096-55JU
Brand :Microchip
THB262.05
Each
Units
4Mbit 256K x 16 bit - 55ns - OTP - Through Hole PLCC 44 16.66 x 16.66 x 4.06mm - +85 °C -
RS Stock No. 127-6551
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C1024-45JU
Brand :Microchip
THB128.585
Each: (In a Pack of 2)
Units
1Mbit 64K x 16 bit - 45ns - OTP - Through Hole PLCC 44 16.66 x 16.66 x 4.06mm - +85 °C -
RS Stock No. 127-4058
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C020-55PU
Brand :Microchip
THB138.275
Each: (In a Pack of 2)
Units
2Mbit 256K x 8 bit - 55ns - OTP - Through Hole PDIP 32 42.29 x 13.97 x 4.44mm - +85 °C -
RS Stock No. 192-1255
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2502S+
THB68.371
Each (In a Tube of 100)
Units
1kbit 1K x 1 bit 1-Wire 120µs 11.5V OTP In System Surface Mount SOIC 8 5 x 4 x 1.5mm 6 V +85 °C 2.8 V
RS Stock No. 190-6989
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2502R+T&R
THB70.52
Each: (In a Pack of 5)
Units
1kbit - 1-Wire - 12 V @ 10 mA - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 6 V +85 °C 2.8 V
RS Stock No. 127-6554
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C1024-70PU
Brand :Microchip
THB137.53
Each: (In a Pack of 2)
Units
1Mbit 64K x 16 bit - 70ns - OTP - Through Hole PDIP 40 52.57 x 13.97 x 4.44mm - +85 °C -
RS Stock No. 540-4839
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2502+
THB70.91
Each
Units
1kbit - - - - - - Through Hole TO-92 3 4.95 (Dia.) x 3.94mm - +85 °C -
RS Stock No. 137-698
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1982-F5+
THB112.95
Each
Units
1kbit - - - - - - - F5 MicroCan 2 17.35 (Dia.) x 5.89mm - +85 °C -
RS Stock No. 127-6555
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C2048-90JU
Brand :Microchip
THB160.00
Each: (In a Pack of 2)
Units
2Mbit 128K x 16 bit - 90ns - OTP - Through Hole PLCC 44 16.66 x 16.66 x 4.06mm - +85 °C -
RS Stock No. 190-6965
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2502P-E48+T&R
THB93.808
Each: (In a Pack of 5)
Units
48bit - 1-Wire - - OTP - Surface Mount TSOC - - 6 V +85 °C 2.8 V
RS Stock No. 190-6082
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2502R+T&R
THB48.807
Each (On a Reel of 3000)
Units
1kbit - 1-Wire - 12 V @ 10 mA - - Surface Mount SOT-23 3 3.04 x 1.4 x 1.02mm 6 V +85 °C 2.8 V
RS Stock No. 189-9375
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS1982-F5+
THB149.20
Each: (In a Pack of 5)
Units
1kbit - - - - - - - F5 MicroCan 2 17.35 (Dia.) x 5.89mm - +85 °C -
RS Stock No. 127-6553
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C1024-70JU
Brand :Microchip
THB126.36
Each: (In a Pack of 2)
Units
1Mbit 64K x 16 bit - 70ns - OTP - Through Hole PLCC 44 16.66 x 16.66 x 4.06mm - +85 °C -
RS Stock No. 127-6563
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C512R-45JU
Brand :Microchip
THB83.994
Each: (In a Pack of 5)
Units
512kbit 64K x 8 bit - 45ns - OTP - Through Hole PLCC 32 14.04 x 11.5 x 3.17mm - +85 °C -
RS Stock No. 127-6564
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C512R-45PU
Brand :Microchip
THB93.658
Each: (In a Pack of 5)
Units
512kbit 64K x 8 bit - 45ns - OTP - Through Hole PDIP 28 37.33 x 13.97 x 4.44mm - +85 °C -
RS Stock No. 127-4047
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C010-45JU
Brand :Microchip
THB103.324
Each: (In a Pack of 5)
Units
1Mbit 128K x 8 bit - 45ns - OTP - Through Hole PLCC 32 14.04 x 11.5 x 3.17mm - +85 °C -
RS Stock No. 146-1071
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2502P+
THB57.56
Each (In a Tube of 120)
Units
1kbit - - - - - - Surface Mount TSOC 6 4 x 3.89 x 1.5mm - +85 °C -
RS Stock No. 127-6547
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.AT27C040-90JU
Brand :Microchip
THB184.725
Each: (In a Pack of 2)
Units
4Mbit 512K x 8 bit - 90ns - OTP - Through Hole PLCC 32 14.04 x 11.5 x 3.17mm - +85 °C -
RS Stock No. 189-9478
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DS2505+
THB119.20
Each: (In a Pack of 5)
Units
16kbit - - - - - - Through Hole TO-92 3 - - +85 °C -