27C512A-12ESO Datasheet

512k ( 64k X 8 ) CMOS EPROM


Features, Applications

High speed performance CMOS Technology for low power consumption 25 mA Active current 30 �A Standby current Factory programming available Auto-insertion-compatible plastic packages Auto ID aids automated programming High speed express programming algorithm Organized x 8: JEDEC standard pinouts - 28-pin Dual-in-line package - 32-pin PLCC Package - 28-pin SOIC package - 28-pin TSOP package - 28-pin VSOP package - Tape and reel Data Retention > 200 years Available for the following temperature ranges - Commercial: +70�C - Industrial: +85�C - Automotive: to +125�C


The Microchip Technology Inc. is a CMOS 512K bit electrically Programmable Read Only Memory (EPROM). The device is organized into 64K words by 8 bits (64K bytes). Accessing individual bytes from an address transition or from power-up (chip enable pin going low) is accomplished in less than 90 ns. This very high speed device allows the most sophisticated microprocessors to run at full speed without the need for WAIT states. CMOS design and processing enables this part to be used in systems where reduced power consumption and high reliability are requirements. A complete family of packages is offered to provide the most flexibility in applications. For surface mount applications, PLCC, VSOP, TSOP or SOIC packaging is available. Tape or reel packaging is also available for PLCC or SOIC packages.

Function Address Inputs Chip Enable Output Enable/Programming Voltage Data Output +5V Power Supply Ground No Connection; No Internal Connection Not Used; No External Connection is Allowed

VCC and input voltages w.r.t. VSS........ to +7.25V VPP voltage w.r.t. VSS during programming......................................... to +14V Voltage on A9 w.r.t. VSS...................... to +13.5V Output voltage w.r.t. VSS............... -0.6V to VCC +1.0V Storage temperature.......................... to +150�C Ambient temp. with power applied..... to +125�C

*Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

VCC +5V �10% Commercial: Industrial: Extended (Automotive): Tamb to +70�C Tamb to +85�C Tamb to +125�C Units pF mA VIN 0 to VCC IOH 400 �A IOL 2.1 mA VOUT 0V to VCC VIN = 0V; Tamb = 1 MHz VOUT = 0V; Tamb = 1 MHz VCC = 1 MHz; OE/VPP CE = VIL; IOUT = 0 mA; VIL to 0.8V; VIH 2.0 to VCC; Note 1 Conditions

Parameter Input Voltages Input Leakage Output Voltages Output Leakage Input Capacitance Output Capacitance Power Supply Current, Active

* Parts: C=Commercial Temperature Range; I, E=Industrial and Extended Temperature Ranges

Note 1: Typical active current increases.75 mA per MHz up to operating frequency for all temperature ranges.

AC Testing Waveform: Output Load: Input Rise and Fall Times: Ambient Temperature: VIH = 2.4V and VIL =.45V; 1 TTL Load 10 ns Commercial: Industrial: Extended (Automotive): 27C512-12 Min 0 Max VOH = 2.0V and VOL = 0.8V

Tamb to +70�C Tamb to +85�C Tamb +125�C 27C512-15 Units Conditions Min 0 Max CE = OE/ VPP = VIL OE/VPP = VIL CE = VIL

27C512-90* Parameter Address to Output Delay CE to Output Delay OE to Output Delay OE to Output High Impedance Output Hold from Address, CE or OE/ VPP, whichever occurred first Sym Min tACC tCE tOE tOFF tOH 0 Max

Notes: (1) tOFF is specified for OE or CE, whichever occurs first (2) OE may be delayed t OE after the falling edge of CE without impact on tCE (3) This parameter is sampled and is not 100% tested.



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