Ac electrical characteristics, Ac test conditions, Output load figure 5 – Rainbow Electronics DS14287 User Manual
Page 18
DS14285/DS14287
18 of 25
AC ELECTRICAL CHARACTERISTICS
Over the operating range
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Cycle
t
CYC
225
DC
ns
Pulse Width, DS/E Low or RD/
WR
High
PW
EL
115
ns
Pulse Width, DS/E Low or RD/
WR
Low
PW
EH
80
ns
Input Rise and Fall Time
t
R
, t
F
30
ns
R/
W
Hold Time
t
RWH
10
ns
R/
W
Setup Time Before DS/E
t
RWS
10
ns
Chip Select Setup Time Before DS,
WR
, or
RD
t
CS
20
ns
Chip Select Hold Time
t
CH
0
ns
Read Data Hold Time
t
DHR
10
50
ns
Write Data Hold Time
t
DHW
0
ns
Muxed Address Valid Time to AS/ALE
Fall
t
ASL
30
ns
Muxed Address Hold Time
t
AHL
10
ns
Delay Time DS/E to AS/ALE Rise
t
ASD
20
ns
Pulse Width AS/ALE High
PW
ASH
60
ns
Delay Time, AS/ALE to DS/E Rise
t
ASED
35
ns
Output Data Delay Time From DS/E or
RD
t
DDR
10
75
ns
9
Data Setup Time
t
DSW
60
ns
Reset Pulse Width
t
RWL
5
µ
s
IRQ
Release from DS
t
IRDS
2
µ
s
IRQ
Release from
RESET
t
IRR
2
µ
s
AC TEST CONDITIONS
Input Pulse Level: 0 to 3.0V
Input Rise/Fall Times: 5 ns
Input and Output Timing Reference Levels: 1.5V
OUTPUT LOAD Figure 5