W78E58BP-40 Nuvoton Technology Corporation of America, W78E58BP-40 Datasheet - Page 24

• Manufacturer Part Number: W78E58BP-40
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W78E58BP-40

• Lead Free Status / Rohs Status: Supplier Unconfirmed

7.3
The AC specifications are a function of the particular process used to manufacture the part, the
ratings of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the
specifications can be expressed in terms of multiple input clock periods (T
usually experience less than a ±20 nS variation. The numbers below represent the performance
expected from a 0.6 micron CMOS process when using 2 and 4 mA output buffers.
7.3.1
Notes:
7.3.2
Notes:
Operating Speed
Clock Period
Clock High
Clock Low
Address Valid to ALE Low
Address Hold from ALE Low
ALE Low to
PSEN
Data Hold after PSEN High
Data Float after PSEN High
ALE Pulse Width
PSEN Pulse Width
1. The clock may be stopped indefinitely in either state.
2. The T
3. There are no duty cycle requirements on the XTAL1 input.
1. P0.0 − P0.7, P2.0 − P2.7 remain stable throughout entire memory cycle.
2. Memory access time is 3 T
3. Data have been latched internally prior to PSEN going high.
4. " Δ " (due to buffer driving delay and wire loading) is 20 nS.
A.C. Characteristics
Clock Input Waveform
Program Fetch Cycle
Low to Data Valid
PARAMETER
PARAMETER
CP
PSEN
specification is used as a reference in other specifications.
Low
XTAL1
CP
.
SYMBOL
SYMBOL
T
T
T
T
T
T
T
T
F
T
T
T
PSW
PDH
ALW
AAS
AAH
PDA
PDZ
APL
OP
CH
CP
CL
T
CH
1 T
1 T
1 T
2 T
3 T
- 24 -
F
MIN.
MIN.
25
10
10
OP,
0
CP
CP
CP
0
0
CP
CP
-
-Δ
-Δ
-Δ
-Δ
-Δ
T
CP
T
2 T
3 T
CL
TYP.
TYP.
W78E58B/W78E058B
Publication Release Date: April 22, 2008
-
-
-
-
-
-
-
-
-
-
CP
CP
2 T
1 T
1 T
MAX.
MAX.
40
-
-
-
-
-
-
-
-
CP
CP
CP
CP
), and actual parts will
UNIT
UNIT
MHz
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
Revision A9
NOTES
NOTES
1, 4
1
2
3
3
4
4
2
3
4
4