s Fast access time Speed options as fast ns s Low power consumption 100 �A maximum CMOS standby current s JEDEC-approved pinout Plug-in upgrade of 1 Mbit EPROM 40-pin DIP/PDIP 44-pin PLCC s Single +5 V power supply s �10% power supply tolerance standard s 100% Flashrite programming Typical programming time of 16 seconds s Latch-up protected 100 mA from V to VCC Versatile features for simple interfacing Both CMOS and TTL input/output compatibility Two line control functions s High noise immunity
The a 2 Mbit, ultraviolet erasable programmable read-only memory. It is organized 128 K words, operates from a single +5 V supply, has a static standby mode, and features fast single address location programming. The Am27C2048 is ideal for use in 16-bit microprocessor systems. The device is available in windowed ceramic DIP packages, and plastic one time programmable (OTP) PDIP and PLCC packages. Data can be typically accessed in less than 55 ns, allowing high-performance microprocessors to operate without any WAIT states. The device 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 mW in active mode, and �W in standby mode. All signals are TTL levels, including programming signals. Bit locations may be programmed singly, in blocks, or at random. The device supports AMD's Flashrite programming algorithm (100 �s pulses), resulting in a typical programming time of 16 seconds.
VCC VSS VPP OE# CE# PGM# Output Enable Chip Enable and Prog Logic Y Decoder A0�A16 Address Inputs Output Buffers Data Outputs DQ0�DQ15Notes: 1. JEDEC nomenclature is in parenthesis. 2. Don't use (DU) for PLCC.
A0�A16 CE# (E#) = Address Inputs = Chip Enable Input
DQ0�DQ15 = Data Input/Outputs OE# (G#) PGM# (P#) VCC VPP VSS = Output Enable Input = Program Enable Input = VCC Supply Voltage = Program Voltage Input = Ground
AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the following:
B OPTIONAL PROCESSING Blank = Standard Processing B = Burn-In VOLTAGE TOLERANCE 5 = VCC 55 ns only See Product Selector Guide and Valid Combinations TEMPERATURE RANGE C = Commercial I = Industrial E = Extended to +125�C) PACKAGE TYPE = 40-Pin Ceramic DIP (CDV040) SPEED OPTION See Product Selector Guide and Valid Combinations
Valid Combinations AM27C2048-55 VCC 5% AM27C2048-55 VCC AM27C2048-200 AM27C2048-255 VCC � 5% DC, DCB, DI, DIB DC, DCB, DE, DEB, DI, DIB DC, DCB, DI, DIB DI5, DI5B
Valid Combinations Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of specific valid combinations and to check on newly released combinations.