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> 135 amd flash memory ic - AM29F040 AM29F010 32-pin dip
135 amd flash memory ic - AM29F040 AM29F010 32-pin dip
What is for sale: 135 amd flash memory ic - AM29F040 AM29F010 32-pin dip
GENERAL DESCRIPTION FOR AM29F040
The Am29F040 is a 4 Mbit, 5.0 Volt-only Flash memory organized as 512 Kbytes of 8 bits each. The Am29F040 is offered in a 32-pin package. This device is designed to be programmed in-system with the standard system 5.0 V V CC supply. A 12.0 V V PP is not required for write or erase operations. The device can also be reprogrammed in standard EPROM programmers.
The standard Am29F040 offers access times between 55 ns and 150 ns, allowing operation of high-speed microprocessors without wait states. To eliminate bus contention the device has separate chip enable (CE), write enable (WE) and output enable (OE) controls.
The Am29F040 is entirely command set compatible with the JEDEC single-power-supply Flash standard. Commands are written to the command register using standard microprocessor write timings. Register contents serve as input to an internal state machine which controls the erase and programming circuitry.
Write cycles also internally latch addresses and data needed for the programming and erase operations. Reading data out of the device is similar to reading from 12.0 Volt Flash or EPROM devices.
The Am29F040 is programmed by executing the program command sequence. This will invoke the Embedded Program Algorithm which is an internal algorithm that automatically times the program pulse widths and verifies proper cell margin. Typically, each sector can be programmed and verified in less than one second.
Erase is accomplished by executing the erase command sequence. This will invoke the Embedded Erase Algorithm which is an internal algorithm that automatically preprograms the array if it is not already programmed before executing the erase operation. During erase, the device automatically times the erase pulse widths and verifies proper cell margin.
GENERAL DESCRIPTION FOR AM29F010
Since the Am29F010 is a 5.0 Volt-only device it eliminates the need for DC to DC converter circuitry to translate the system voltage level from 5.0 V to 12.0 V, for write and erase operations. This simplifies the hardware design, results in reduced board space, and lowers the system cost. 5.0 Volt-only programming also reduces the total system level power consumption.
The Am29F010 provides a minimum of 100,000 write endurance cycles per sector. This kind of high endurance is especially important in the emerging markets of embedded Flash disks and removable memory cards. Typical endurance last well beyond the 100,000 cycle minimum.
The 16 Kbyte sector erase architecture is another added advantage which is valued by many system designers. This feature provides the capability to selectively rewrite portions of the memory array while leaving the rest of the memory contents fixed. This architecture simplifies the design and debugging process by providing program modularity to the system. Individual sectors may also be hardware protected.
The Am29F010 has an access time of as fast as 45 ns which will provide true 0 wait state performance in very high speed designs.
The device incorporates AMD’s Embedded Algorithm which reduces software overhead for the system designer. It also increases system level performance since the CPU will be free to do other tasks during reprogramming operations.
The device also incorporates several features to prevent inadvertent write cycles.
— During power-up and power-down, write cycles are locked out when VCC is less than 3.2 V (typically 3.7 V). Under these conditions, the command register is disabled and all internal program/erase circuits are disabled.
— The device ignores noise pulses or glitches of less than 5 ns (typically) on control signals OE, CE and WE and will not initiate a write cycle.
— During power-up of the device even with WE = CE = VIL and OE = VIH, the state machine will not accept commands on the rising edge of WE. The internal state machine is automatically reset to the read mode.
There are 135 parts in this listing. 90 of them are BRAND NEW and have never been used. The other 45 have been used but are still in very good condition. There are at least 34 of the AM29F040 and at least 58 of the AM29F010. I can’t read the numbers on most of the used ones. The used ones are a mix of both parts.
Contact: L.lang@parts-recycling.com (Lawrence Lang)
(email hidden).