M27128A-20F1 STMicroelectronics, M27128A-20F1 Datasheet
M27128A-20F1
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M27128A-20F1 Summary of contents
Page 1
... The M27128A is a 131,072 bit UV erasable and electrically programmable memory EPROM organized as 16,384 words by 8 bits. The M27128A 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. A new pattern can then be written to the device by follow- ing the programming procedure ...
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... The M27128A has a standby mode which reduces the maximum active power current from 85mA 40mA. The M27128A is placed in the standby mode applying a TTL high signal to the E input. When the standby mode, the outputs are in a high impedance state, independent of the G input. ...
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... PCB traces. Programming When delivered (and after each erasure for UV EPPROM), all bits of the M27128A are in the “1" state. Data is introduced by selectively program- ming ”0s" into the desired bit locations. Although only “0s” will be programmed, both “1s” and “0s” ...
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... M27128A 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 (T A Symbol Parameter C Input Capacitance ...
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... and removed simultaneously or after V PP M27128A = Min Max –0.1 0 0.45 2 M27128A -3, -30 -4 Max Min Max Min Max 250 300 450 250 300 450 100 120 150 60 0 105 0 130 60 0 105 0 130 Unit ...
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... M27128A 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 Voltage ID Note must be applied simultaneously with or before V CC Table 9 ...
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... Except for E, all like inputs (including G) of the parallel M27128A may be common. A TTL low pulse ap- plied to a M27128A’s E input, with V AI00775B program that M27128A. A high level E input inhibits the other M27128As from being programmed. DATA OUT tGLQV tGHQZ ...
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... Research shows that constant exposure to room level fluorescent lighting could erase a typical M27128A in about 3 years, while it would take approximately 1 week to cause erasure when exposed to direct sunlight. If the M27128A exposed to these types of lighting conditions ...
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... M27128A inches Typ Min 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 0.100 – 1.300 – 0.637 0.721 0.125 0.161 0.060 ...
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... M27128A 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 ...