NM27C240 Datasheet, PDF (5/10 Pages) Fairchild Semiconductor – 4,194,304-Bit (256k x 16) High Performance CMOS EPROM

DC Electrical Characteristics (Notes 11, 12, 13, 14)
Symbol
t_AS
t_OES
t_DS
t_VPS
t_VCS
t_AH
t_DH
t_DF
t_PW
t_OE
I_PP
I_CC
T_A
V_CC
V_PP
t_FR
V_IL
V_IH
t_IN
t_OUT
Parameter
Address Setup Time
OE Setup Time
Data Setup Time
V_PP Setup Time
V_CC Setup Time
Address Hold Time
Data Hold Time
Output Enable to Output Float Delay
Program Pulse Width
Data Valid from OE
V_PP Supply Current during Programming Pulse
V_CC Supply Current
Temperature Ambient
Power Supply Voltage
Programming Supply Voltage
Input Rise, Fall Time
Input Low Voltage
Input High Voltage
Input Timing Reference Voltage
Output Timing Reference Voltage
Conditions
CE = V_IL
CE = V_IL
CE = V_IL, PGM = V_IL
Programming Waveforms (Note 13)
Min
1
1
1
1
1
0
1
0
45
20
6.25
12.5
5
2.4
0.8
0.8
Typ
50
25
6.5
12.75
0.0
4.0
Max
2.4
60
105
100
30
30
30
6.75
13.0
0.45
2.0
2.0
Units
µs
µs
µs
µs
µs
µs
µs
ns
µs
ns
mA
mA
°C
V
V
ns
V
V
V
V
Program
Adresses
2.0V
0.8V
Address N
Data
2.0V
0.8V
t_AS
Data In Stable
Add N
High Z
t_DS
t_DH
6.25V
V_CC
t_VCS
Program Verify
t_AH
Data Out Valid
Add N
t_DF
V_PP 12.75V
t_VPS
CE/PGM
2.0V
0.8V
t_PW
t_OES t_OE
OE
2.0V
0.8V
DS011949-5
Note 11: Fairchild’s standard product warranty applies only to devices programmed to specifications described herein.
Note 12: V_CC must be applied simultaneously or before V_PP and removed simultaneously or after V_PP. The EPROM must not be inserted into or removed from a board with
voltage applied to V_PP or V_CC.
Note 13: The maximum absolute allowable voltage which may be applied to the V_PP pin during programming is 14V. Care must be taken when switching the V_PP supply to
prevent any overshoot from exceeding this 14V maximum specification. At least a 0.1 µF capacitor is required across V_PP, V_CC to GND to suppress spurious voltage transients
which may damage the device.
Note 14: During power up the CE/PGM pin must be brought high (≥V_IH) either coincident with or before power is applied to V_PP.
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