Features: DISTINCTIVE CHARACTERISTICSFast access time- 55 nsLow power consumption- 20 mA typical CMOS standby currentJEDEC-approved pinoutSingle +5 V power supply±10% power supply tolerance available100% Flashrite programming- Typical programming time of 4 seconds Latch-up protected to 100 mA fro...
Am27C256: Features: DISTINCTIVE CHARACTERISTICSFast access time- 55 nsLow power consumption- 20 mA typical CMOS standby currentJEDEC-approved pinoutSingle +5 V power supply±10% power supply tolerance availabl...
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Features: . REFRACTORY/G . OLD METALLIZATION . EMITTER SITE BALLASTED . 3:1 VSWR CAPABILITY·LOW TH...
Features: .REFRACTORY/GOLD METALLIZATION.EMITTER SITE BALLASTED.LOW THERMAL RESISTANCE.INPUT/OUTPU...
DISTINCTIVE CHARACTERISTICS
Fast access time
- 55 ns
Low power consumption
- 20 mA typical CMOS standby current
JEDEC-approved pinout
Single +5 V power supply
±10% power supply tolerance available
100% Flashrite programming
- Typical programming time of 4 seconds
Latch-up protected to 100 mA from 1 V to
VCC + 1 V
High noise immunity
Versatile features for simple interfacing
- Both CMOS and TTL input/output
compatibility
- Two line control functions
Standard 28-pin DIP, PDIP, 32-pin TSOP and
PLCC packages
The Am27C256 is a 256K-bit ultraviolet erasable programmable read-only memory. It is organized as 32K words by 8 bits per word, operates from a single +5 V supply, has a static standby mode, and features fast single address location programming. Products are available in windowed ceramic DIP packages as well as plastic one time programmable (OTP) PDIP, TSOP, and PLCC packages.
Typically, any byte can be accessed in less than 55 ns, allowing operation with high-performance microprocessors without any WAIT states. The Am27C256 offers separate Output Enable (OE) and Chip Enable (CE)
controls, thus eliminating bus contention in a multiple bus microprocessor system.
AMD's CMOS process technology provides high speed, low power, and high noise immunity. Typical power consumption is only 80 mW in active mode, and 100 mW in standby mode.
All signals are TTL levels, including programming signals. Bit locations may be programmed singly, in blocks, or at random. The Am27C256 supports AMD's Flashrite programming algorithm (100 ms pulses) resulting in typical programming time of 4 seconds.