lh28f400su-nc Sharp Microelectronics of the Americas, lh28f400su-nc Datasheet - Page 20

• Manufacturer Part Number: lh28f400su-nc
• Description: 512k 256k Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

LH28F400SU-NC
Timing Nomenclature
For 5.0 V systems use the standard JEDEC cross point definitions.
Each timing parameter consists of 5 characters. Some common examples are defined below:
t
t
t
t
t
20
CE
OE
ACC
AS
DH
0.45
NOTE:
AC test inputs are driven at V
(0.45 V
and V
and fall times (10% to 90%) < 10 ns.
NOTE:
AC test inputs are driven at 3.0 V for a Logic '1'
and 0.0 V for a Logic '0'. Input timing begins,
and output timing ends at 1.5 V. Input rise
and fall times (10% to 90%) < 10 ns.
5 V
2.4
3.0
0.0
W
Q
G
A
D
E
P
R
V
INPUT
Reference Waveform (V
Reference Waveform (V
t
t
t
t
t
INPUT
IL
ELQV
GLQV
AVQV
AVWH
WHDX
TTL
(0.8 V
Figure 15. Transient Input/Output
Figure 16. Transient Input/Output
Address Inputs
Data Inputs
Data Outputs
CE
OE
WE (Write Enable)
RP
RY
Any Voltage Level
V
) for a Logic '0'. Input timing begins at V
1.5
CC
»
»
»
/ BY
»
TTL
(Chip Enable)
(Deep Power-Down Pin)
(Output Enable)
at 4.5 V Min.
PIN CHARACTERS
time (t) from CE
time (t) from OE
time (t) from address (A) valid (V) to the outputs (Q) becoming valid (V)
time (t) from address (A) valid (V) to WE
time (t) from WE
). Output timing ends at V
»
2.0
0.8
(Ready/Busy)
TEST POINTS
TEST POINTS
OH
(2.4 V
»
»
CC
CC
»
(E) going low (L) to the outputs (Q) becoming valid (V)
(G) going low (L) to the outputs (Q) becoming valid (V)
(W) going high (H) to when the data (D) can become undefined (X)
TTL
= 5.0 V ±0.5 V)
= 5.0 V ±.25 V)
) for a Logic '1' and V
IH
and V
28F400SUT-NC60-13
28F400SUT-NC60-14
IH
H
V
X
L
Z
IL
1.5
(2.0 V
. Input rise
2.0
0.8
OUTPUT
OUTPUT
High
Low
Valid
Driven, but not necessarily valid
High Impedance
TTL
)
OL
»
(W) going high (H)
PIN STATES
FROM OUTPUT
UNDER TEST
FROM OUTPUT
UNDER TEST
Figure 17. Transient Equivalent Testing
Figure 18. Transient Equivalent Testing
Load Circuit (V
Load Circuit (V
4M (512K × 8, 256K × 16) Flash Memory
2.5 ns OF 25
2.5 ns OF 83
TOTAL CAPACITANCE = 100 pF
TOTAL CAPACITANCE = 30 pF
CC
CC
= 5.0 V ±0.5 V)
= 5.0 V ±.25 V)
TRANSMISSION LINE
TRANSMISSION LINE
28F400SUT-NC60-15
28F400SUT-NC60-16
POINT
POINT
TEST
TEST