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MX27L256 Dataheets PDF



Part Number MX27L256
Manufacturers Macronix International
Logo Macronix International
Description 256K-BIT [32Kx8] LOW VOLTAGE OPERATION CMOS EPROM
Datasheet MX27L256 DatasheetMX27L256 Datasheet (PDF)

www.DataSheet4U.com MX27L256 FEATURES 256K-BIT [32Kx8] LOW VOLTAGE OPERATION CMOS EPROM • • • • Completely TTL compatible Operating current: 10mA @ 3.6V, 5MHz Standby current: 10uA Package type: - 28 pin plastic DIP - 32 pin PLCC - 28 pin 8 x 13.4mm TSOP(I) • • • • • 32K x 8 organization Wide Voltage range, 2.7V to 3.6V DC +12.5V programming voltage Fast access time: 120/150/200/250 ns Totally static operation GENERAL DESCRIPTION The MX27L256 is a 256K-bit, One-Time Programmable Read Only M.

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www.DataSheet4U.com MX27L256 FEATURES 256K-BIT [32Kx8] LOW VOLTAGE OPERATION CMOS EPROM • • • • Completely TTL compatible Operating current: 10mA @ 3.6V, 5MHz Standby current: 10uA Package type: - 28 pin plastic DIP - 32 pin PLCC - 28 pin 8 x 13.4mm TSOP(I) • • • • • 32K x 8 organization Wide Voltage range, 2.7V to 3.6V DC +12.5V programming voltage Fast access time: 120/150/200/250 ns Totally static operation GENERAL DESCRIPTION The MX27L256 is a 256K-bit, One-Time Programmable Read Only Memory. It is organized as 32K by 8 bits, operates from a single + 3volt supply, has a static standby mode, and features fast single address location programming. All programming signals are TTL levels, requiring a single pulse. For programming from outside the system, existing EPROM programmers may be used. The MX27L256 supports intelligent fast programming algorithm which can result in programming time of less than ten seconds. This EPROM is packaged in industry standard 28 pin dual-in-line packages, 32 lead PLCC, and 28 lead TSOP(I) packages. PIN CONFIGURATIONS PDIP VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 Q0 Q1 Q2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC A14 A13 A8 A9 A11 OE A10 CE Q7 Q6 Q5 Q4 Q3 BLOCK DIAGRAM VCC CE OE CONTROL LOGIC OUTPUT BUFFERS PLCC VPP A12 A14 A13 4 NC A7 Q0~Q7 1 A6 A5 A4 A3 A2 A1 A0 NC Q0 5 32 30 29 A8 A9 A11 NC A0~A14 ADDRESS INPUTS . . . . . . . . Y-DECODER . . . . . . . . VPP Y-SELECT MX27L256 9 MX27L256 25 OE A10 CE Q7 256K BIT CELL MAXTRIX X-DECODER 13 14 Q1 Q2 GND 17 NC Q3 Q4 21 20 Q5 Q6 VCC GND 8 x 13.4mm 28 -TSOP(I) OE A11 A9 A8 A13 A14 VCC VPP A12 A7 A6 A5 A4 A3 22 23 24 25 26 27 28 1 2 3 4 5 6 7 21 20 19 18 17 16 15 14 13 12 11 10 9 8 A10 CE Q7 Q6 Q5 Q4 Q3 GND Q2 Q1 Q0 A0 A1 A2 PIN DESCRIPTION SYMBOL A0~A14 Q0~Q7 CE OE VPP NC VCC GND PIN NAME Address Input Data Input/Output Chip Enable Input Output Enable Input Program Supply Voltage No Internal Connection Power Supply Pin Ground Pin MX27L256 P/N: PM0248 REV. 3.6, AUG. 26, 2003 1 www.DataSheet4U.com MX27L256 FUNCTIONAL DESCRIPTION THE PROGRAMMING OF THE MX27L256 When the MX27L256 is delivered, or it is erased, the chip has all 256K bits in the "ONE" or HIGH state. "ZEROs" are loaded into the MX27L256 through the procedure of programming. For programming, the data to be programmed is applied with 8 bits in parallel to the data pins. VCC must be applied simultaneously or before VPP, and removed simultaneously or after VPP. When programming an MXIC EPROM, a 0.1uF capacitor is required across VPP and ground to suppress spurious voltage transients which may damage the device. AUTO IDENTIFY MODE The auto identify mode allows the reading out of a binary code from an EPROM that will identify its manufacturer and device type. This mode is intended for use by programming equipment for the purpose of automatically matching the device to be programmed with its corresponding programming algorithm. This mode is functional i.


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