m2764a STMicroelectronics, m2764a Datasheet
m2764a
Available stocks
Related parts for m2764a
m2764a Summary of contents
Page 1
... TTL COMPATIBLE DURING READ and PROGRAM FAST PROGRAMMING ALGORITHM ELECTRONIC SIGNATURE PROGRAMMING VOLTAGE: 12V DESCRIPTION The M2764A is a 65,536 bit UV erasable and electrically programmable memory EPROM organized as 8,192 words by 8 bits. The M27C64A is housed pin Window Ce- ramic Frit-Seal Dual-in-Line package. The trans- parent lid allows the user to expose the chip to ultraviolet light to erase the bit pattern ...
Page 2
... Q5 The M2764A has a standby mode which reduces Q4 the maximum active power current from 75mA to 35mA. The M2764A is placed in the standby mode Q3 by applying a TTL high signal to the E input. When in the standby mode, the outputs are in a high impedance state, independent of the G input. ...
Page 3
... PCB traces. Programming When delivered (and after each erasure for UV EPROM), all bits of the M2764A are in the “1" state. Data is introduced by selectively programming ”0s" into the desired bit locations. Although only “0s” will be programmed, both “1s” and “0s” can be present in the data word. The only way to change a “ ...
Page 4
... M2764A AC MEASUREMENT CONDITIONS Input Rise and Fall Times Input Pulse Voltages Input and Output Timing Ref. Voltages Note that Output Hi-Z is defined as the point where data is no longer driven. Figure 3. AC Testing Input Output Waveforms 2.4V 0.45V (1) Table 5. Capacitance ( MHz ) A Symbol ...
Page 5
... 0. M2764A Unit -2, -20 blank, -25 Min Max Min Max 200 250 ns 200 250 ns 75 100 M2764A Unit -4 Min Max 450 ns 450 ns 150 ns 0 130 ns 0 130 5/10 ...
Page 6
... M2764A Table 8. Programming Mode DC Characteristics ( 0.25V Symbol Parameter I Input Leakage Current LI I Supply Current CC I Program Current PP V Input Low Voltage IL V Input High Voltage IH V Output Low Voltage OL V Output High Voltage OH VA9 A9 Voltage Note must be applied simultaneously with or before V CC Table 9 ...
Page 7
... Except for E, all like inputs (including G) of the parallel M2764A may be common. A TTL low pulse applied to a M2764A’s E input, with V program that M2764A. A high level E input inhibits AI00775B the other M2764As from being programmed. M2764A ...
Page 8
... W-sec/cm is approximately minutes using an ultra- violet lamp with 12000 W/cm M2764A should be placed within 2 inch) of the lamp tubes during the erasure. Some lamps have a filter on their tubes which should be re- moved before erasure. M2764A ...
Page 9
... M2764A inches Min Max 0.225 0.020 0.070 0.154 0.200 0.016 0.022 0.046 0.056 0.009 0.012 1.500 0.606 0.622 0.514 0.526 – – – – 0.637 0.721 0.125 ...
Page 10
... M2764A Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice ...