Rainbow Electronics DS26504 - Manual (Page 115)

DS26504 T1/E1/J1/64KCC BITS Element
115 of 128
20. AC TIMING PARAMETERS AND DIAGRAMS
Capacitive test loads are 40pF for bus signals and 20pF for all others.
20.1 Multiplexed Bus
Table 20-1. AC Characteristics, Multiplexed Parallel Port
(V
DD
= 3.3V ±5%, T
A
= 0°C to +70°C for DS26504L; V
DD
= 3.3V ±5%, T
A
= -40°C to +85°C for
DS26504LN.) (Note 1) ( Figure 20-1 , Figure 20-2 , and Figure 20-3 )
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Cycle Time t
CYC
200 ns
Pulse Width, DS Low or RD High PW
EL
100 ns
Pulse Width, DS High or RD Low PW
EH
100 ns
Input Rise/Fall Times t
R
, t
F
20 ns
R/ W Hold Time t
RWH
10 ns
R/ W Setup Time Before DS High t
RWS
50 ns
CS Setup Time Before DS, WR, or
RD Active
t
CS
20 ns
CS Hold Time t
CH
0 ns
Read Data Hold Time t
DHR
10 50 ns
Write Data Hold Time t
DHW
5 ns
Muxed Address Valid to AS or
ALE Fall
t
ASL
15 ns
Muxed Address Hold Time t
AHL
10 ns
Delay Time DS, WR, or RD to AS
or ALE Rise
t
ASD
20 ns
Pulse Width AS or ALE High PW
ASH
30 ns
Delay Time, AS or ALE to DS,
WR, or RD
t
ASED
10 ns
Output Data Delay Time from DS
or RD
t
DDR
80 ns
Data Setup Time t
DSW
50 ns
Note 1: The timing parameters in this table are guaranteed by design (GBD).