at49lw040 ATMEL Corporation, at49lw040 Datasheet - Page 20

• Manufacturer Part Number: at49lw040
• Description: At49lw040 4-megabit Firmware Hub Flash Memory
• Manufacturer: ATMEL Corporation

FWH Interface AC Input/Output Specifications
Notes:
FWH Interface AC Timing Specifications
Clock Specification
Notes:
Clock Waveform
20
Symbol
I
I
I
I
slewr
slewf
Symbol
t
t
t
-
-
oh
ol
cl
ch
CYC
HIGH
LOW
(AC)
(AC)
1. PCI specification output load is used.
2. I
3. I
1. PCI components must work with any clock frequency between nominal DC and 33 MHz. Frequencies less than16 MHz may
2. Applies only to rising edge of signal.
AT49LW040
be guaranteed by design rather than testing.
Parameter
Switching Current High
(Test Point)
Switching Current Low
(Test Point)
Low Clamp Current
High Clamp Current
Output Rise Slew Rate
Output Fall Slew Rate
Parameter
CLK Cycle Time
CLK High Time
CLK Low Time
CLK Slew Rate
RST or INIT Slew Rate
OH
OL
= (256/V
= (98.0/V
0.3 V
0.4 V
CC
0.5 V
CC
CC
CC
) * V
) * (V
(1)
CC
OUT
OUT
(V
(2)
- V
CC
CC
- V
) *(V
OUT
0.6 V
OUT
).
Condition
0 < V
0.3 V
0.7 V
V
V
0.6 V
0.18 V
V
-3 < V
V
0.2 V
0.6 V
t
HIGH
OUT
OUT
CC
CC
+ 0.4 V
> V
+ 4 > V
CC
OUT
CC
CC
CC
CC
CC
= 0.7 V
= 0.18 V
IN
CC
OUT
< V
< V
> V
- 0.6 V
- 0.2 V
-1
> V
0.3 V
CC
Condition
peak-to-peak
OUT
OUT
OUT
IN
CC
OUT
).
0.6 V
CC
CC
CC
t
CC
<0.9 V
< V
> 0.1 V
V
CYC
> 0
CC
load
load
CC
CC
+ 1
CC
(1)
(1)
CC
0.2 V
t
LOW
25 + (V
CC
-25 + (V
-17.1 (V
-17.1 (V
IN
-12 V
16 V
- V
IN
Min
CC
CC
1
1
CC
+ 1)/0.015
CC
CC
- V
- V
Min
30
11
11
50
- 1)/0.015
1
OUT
OUT
)
)
0.4 V
(minimum)
Max
-32 V
CC, p-to-p
38 V
Note 2
Note 3
4
Max
4
4
CC
CC
3342A–FLASH–6/03
mV/ns
Units
V/ns
Units
V/ns
V/ns
ns
ns
ns
mA
mA
mA
mA
mA
mA
mA
mA