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M27C320-100M1 Datasheet(PDF) 5 Page - STMicroelectronics |
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M27C320-100M1 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 15 page 5/15 M27C320 Table 7. Read Mode DC Characteristics (1) (TA = 0 to 70 °C; VCC =5V ± 10%) 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 carefull decoupliing 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 dependant on the capacititive and inductive load- ing of the device outputs. The associated transient voltage peaks can be supressed by complying with the two line output control and by properly se- lected decoupling capacitors. It is recommended that a 0.1 µF ceramic 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 4.7 µF electrolytic capacitor should be used between VCC and VSS for every eight devices. This capacitor should be mounted near the power supply connection point. The pur- pose of this capacitor is to overcome the voltage drop caused by the inductive effects of PCB trac- es. Programming When delivered, all bits of the M27C320 are in the ’1’ state. Data is introduced by selectively pro- gramming ’0’s into the desired bit locations. Al- though only ’0’s will be programmed, both ’1’s and ’0’s can be present in the data word. The M27C320 is in the programming mode when VPP input is at 12.5V, G is at VIH and E is pulsed to VIL. The data to be programmed 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. |
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