M27C405
(1)
Table 8B. Read Mode AC Characteristics
(T = 0 to 70°C or –40 to 85°C; V = 5V ± 10%; V = V
)
A
CC
PP
CC
M27C405
-120
Symbol
Alt
Parameter
Test Condition
-100
-150
Unit
Min Max Min Max Min Max
t
t
E = V , G = V
Address Valid to Output Valid
Chip Enable Low to Output Valid
Output Enable Low to Output Valid
100
100
50
120
120
60
150 ns
150 ns
AVQV
ACC
IL
IL
t
t
G = V
IL
ELQV
CE
t
t
E = V
IL
60
50
50
ns
ns
ns
GLQV
OE
(2)
t
t
G = V
Chip Enable High to Output Hi-Z
Output Enable High to Output Hi-Z
0
0
30
30
0
0
40
40
0
0
t
DF
DF
IL
EHQZ
(2)
E = V
t
IL
GHQZ
Address Transition to Output
Transition
t
t
E = V , G = V
IL IL
0
0
0
ns
AXQX
OH
Note: 1. V must be applied simultaneously with or before V and removed simultaneously or after V .
PP
CC
PP
2. Sampled only, not 100% tested
Figure 5. Read Mode AC Waveforms
VALID
tGLQV
VALID
A0-A18
tAVQV
tAXQX
E
tEHQZ
tGHQZ
G
tELQV
Hi-Z
Q0-Q7
AI00724B
System Considerations
The power switching characteristics of Advanced
CMOS EPROMs require careful decoupling of the
output control and by properly selected decoupling
capacitors. It is recommended that a 0.1µF ceram-
ic capacitor be used on every device between V
CC
and V . This should be a high frequency capaci-
SS
devices. The supply current, I , has three seg-
CC
tor of low inherent inductance and should be
placed as close to the device as possible. In addi-
tion, a 4.7µF bulk electrolytic capacitor should be
ments that are of interest to the system designer:
the standby current level, the active current level,
and transient current peaks that are produced by
the falling and rising edges of E. The magnitude of
the transient current peaks is dependent on the
capacitive and inductive loading of the device at
the output. The associated transient voltage peaks
can be suppressed by complying with the two line
used between V and V for every eight devic-
CC
SS
es. The bulk capacitor should be located near the
power supply connection point. The purpose of the
bulk capacitor is to overcome the voltage drop
caused by the inductive effects of PCB traces.
6/14