HI-1575
AC ELECTRICAL CHARACTERISTICS
VDD = 3.3 V, GND = 0V, T
A
=Operating Temperature Range (unless otherwise specified)
PARAMETER
TRANSMITTER
RiseTtime
Fall Time
RECEIVER (See figures 8 and 9)
Sync Transition Span
Short Data Transition Span
Long Data Transition Span
Delay Mid-Parity to Flag Set
Flag Setup Time to Read
Flag Reset Delay
DATA BUS TIMING - WRITE
Strobe STRB Pulse Width
REG Write Setup Time
REG Write Hold Time
Databus / SYNC Write Setup Time
Databus / SYNC Write Hold Time
CHA/CHB Write Setup Time
CHA/CHB Write Hold Time
R/W Write Setup Time
R/W Write Hold Time
SYMBOL
tr
tf
t
R1
t
R2
t
R3
t
FH
t
FR
t
RF
(See figure 10)
t
STR
t
RWS
t
RWH
t
DWS
t
DWH
t
CHWS
t
CHWH
t
RWWS
t
RWWH
t
STR
t
RRS
t
RRH
t
DRV
t
DRT
t
CHRS
t
CHRH
t
RWRS
t
RWRH
TEST CONDITIONS
35 ohm load
35 ohm load
MIN
100
100
TYP
MAX
300
300
UNITS
ns
ns
ns
ns
ns
(Measured at Point “A
D
” in Figure 12)
1500
500
1000
2500
0
60
50
50
10
50
10
50
10
50
10
50
50
10
60
0
50
10
50
10
60
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DATA BUS TIMING - READ (See figure 11)
Strobe STRB Pulse Width
REG Read Setup Time
REG Read Hold Time
Data Read to Databus Valid
Data Read to Databus Tri-state
CHA/CHB Read Setup Time
CHA/CHB Read Hold Time
R/W Read Setup Time
R/W Read Hold Time
HI-1575 TRANSMITTER
BUSA/B
1:2.5
55
W
35
W
Point “A
D
“
BUSA/B
Isolation
Transformer
55
W
55
W
Point “A
D
“
35
W
55
W
2.5:1
HI-1575 RECEIVER
Isolation
Transformer
FIGURE 12. DIRECT COUPLED TEST CIRCUITS
HOLT INTEGRATED CIRCUITS
9
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
