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M27C400-55XF1TR датащи(PDF) 5 Page - STMicroelectronics |
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M27C400-55XF1TR датащи(HTML) 5 Page - STMicroelectronics |
5 / 14 page 5/14 M27C400 Table 7. Read Mode DC Characteristics (1) (TA = 0 to 70 °C or –40 to 85 °C; VCC = 5V ± 5% or 5V ± 10%; VPP = VCC) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP. 2. Maximum DC voltage on Output is VCC +0.5V. Symbol Parameter Test Condition Min Max Unit ILI Input Leakage Current 0V ≤ VIN ≤ VCC ±1 µA ILO Output Leakage Current 0V ≤ VOUT ≤ VCC ±10 µA ICC Supply Current E = VIL, G = VIL, IOUT = 0mA, f = 8MHz 70 mA E = VIL, G = VIL, IOUT = 0mA, f = 5MHz 50 mA ICC1 Supply Current (Standby) TTL E = VIH 1mA ICC2 Supply Current (Standby) CMOS E > VCC – 0.2V 100 µA IPP Program Current VPP = VCC 10 µA VIL Input Low Voltage –0.3 0.8 V VIH (2) Input High Voltage 2 VCC + 1 V VOL Output Low Voltage IOL = 2.1mA 0.4 V VOH Output High Voltage TTL IOH = –400µA 2.4 V System Considerations The power switching characteristics of Advanced CMOS EPROMs require careful decoupling of the supplies to the devices. The supply current ICC has three segments of importance to the system designer: the standby current, the active current and the transient peaks that are produced by the falling and rising edges of E. The magnitude of the transient current peaks is dependent on the ca- pacitive and inductive loading of the device out- puts. The associated transient voltage peaks can be suppressed by complying with the two line out- put control and by properly selected decoupling capacitors. It is recommended that a 0.1µF ceram- ic capacitor is used on every device between VCC and VSS. This should be a high frequency type of low inherent inductance and should be placed as close as possible to the device. In addition, a 4.7µF electrolytic capacitor should be used be- tween VCC and VSS for every eight devices. This capacitor should be mounted near the power sup- ply connection point. The purpose of this capacitor is to overcome the voltage drop caused by the in- ductive effects of PCB traces. Programming When delivered (and after each erasure for UV EPROM), all bits of the M27C400 are in the '1' state. Data is introduced by selectively program- ming '0's into the desired bit locations. Although only '0's will be programmed, both '1's and '0's can be present in the data word. The only way to change a '0' to a '1' is by die exposition to ultravio- let light (UVEPROM). The M27C400 is in the pro- gramming mode when VPP input is at 12.5V, G is at VIH and E is pulsed to VIL. The data to be pro- grammed is applied to 16 bits in parallel to the data output pins. The levels required for the address and data inputs are TTL. VCC is specified to be 6.25V ± 0.25V. |
Аналогичный номер детали - M27C400-55XF1TR |
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Аналогичное описание - M27C400-55XF1TR |
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