User Manual

AT49BV/LV040
6
AC Read Waveforms
(1)(2)(3)(4)
Notes: 1. CE may be delayed up to t
ACC
- t
CE
after the address transition without impact on t
ACC
.
2. OE may be delayed up to t
CE
- t
OE
after the falling edge of CE without impact on t
CE
or by t
ACC
- t
OE
after an address change
without impact on t
ACC
.
3. t
DF
is specified from OE or CE, whichever occurs first (CL = 5 pF).
4. This parameter is characterized and is not 100% tested.
Input Test Waveforms and
Measurement Level
t
R
, t
F
< 5 ns
Output Test Load
Note: 1. This parameter is characterized and is not 100% tested.
AC Read Characteristics
Symbol Parameter
AT49LV040-70 AT49BV/LV040-90 AT49BV040-12
UnitsMinMaxMinMaxMinMax
t
ACC
Address to Output Delay 70 90 120 ns
t
CE
(1)
CE to Output Delay 70 90 120 ns
t
OE
(2)
OE to Output Delay 0 35 0 40 0 50 ns
t
DF
(3)(4)
CE or OE to Output Float 0 25 0 25 0 30 ns
t
OH
Output Hold from OE, CE or Address,
whichever comes first
000ns
Pin Capacitance
f = 1 MHz, T = 25°C
(1)
Symbol Typ Max Units Conditions
C
IN
46pFV
IN
= 0V
C
OUT
812pFV
OUT
= 0V