Table of Contents
Advertisement
21.4 Transmit AC Characteristics
AC CHARACTERISTICS – TRANSMIT SIDE [See Figure 21-11 to Figure 21-13]
PARAMETER
TCLK Period
TCLK Pulse Width
TCLKI Period
TCLKI Pulse Width
TSYSCLK Period
TSYSCLK Pulse Width
TSYNC or TSSYNC Set Up to TCLK
or TSYSCLK falling
TSYNC or TSSYNC Pulse Width
TSER, TSIG, TDATA, TLINK,
TPOSI, TNEGI Set Up to TCLK,
TSYSCLK, TCLKI Falling
TSER, TSIG, TDATA, TLINK,
TPOSI, TNEGI Hold from TCLK,
TSYSCLK, TCLKI Falling
TCLK, TCLKI or TSYSCLK Rise and
Fall Times
Delay TCLKO to TPOSO, TNEGO
Valid
Delay TCLK to TESO Valid
Delay TCLK to TCHBLK, TCHCLK,
TSYNC, TLCLK
Delay TSYSCLK to TCHCLK,
TCHBLK, CO
CI Set Up to TSYSCLK Rising
CI Pulse Width
NOTES:
1. TSYSCLK = 1.544 MHz.
2. TSYSCLK = 2.048 MHz.
3. TSYSCLK = 4.096 MHz
4. TSYSCLK = 8.192 MHz
(0° ° ° ° C to 70° ° ° ° C; V
0° ° ° ° C to 70° ° ° ° C; V
-40° ° ° ° C to +85° ° ° ° C; V
-40° ° ° ° C to +85° ° ° ° C; V
SYMBOL
MIN
t
CP
t
75
CH
t
75
CL
t
LP
t
75
LH
t
75
LL
t
100
SP
t
100
SP
t
100
SP
t
100
SP
t
50
SH
t
50
SL
t
20
SU
t
50
PW
t
20
SU
t
20
HD
t
, t
R
F
t
DD
t
D1
t
D2
t
D3
t
20
SC
t
50
WC
114 of 117
= 3.3V ± ± ± ± 5% for DS21354L;
DD
= 5.0V ± ± ± ± 5% for DS21554L;
DD
= 3.3V ± ± ± ± 5% for DS21354LN;
DD
= 5.0V ± ± ± ± 5% for DS21554LN)
DD
TYP
MAX
UNITS
488
488
648
448
244
122
t
–5
CH
or
t
–5
SH
25
ns
50
ns
50
ns
50
ns
75
ns
ns
ns
DS21354 & DS21554
NOTES
ns
ns
ns
ns
ns
ns
ns
1
ns
2
ns
3
ns
4
ns
ns
ns
ns
ns
ns
Advertisement
Table of Contents
