Datasheet

DS21352/DS21552
134 of 137
24.4 TRANSMIT AC CHARACTERISTICS
AC CHARACTERISTICS –
TRANSMIT SIDE
[See Figure 24-11 to Figure 24-13]
(0°C to 70°C; V
DD
= 3.3V ± 5% for DS21352L;
0°C to 70°C; V
DD
= 5.0V ± 5% for DS21552L;
-40°C to +85°C; V
DD
= 3.3V ± 5% for DS21352LN;
-40°C to +85°C; V
DD
= 5.0V ± 5% for DS21552LN)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
TCLK Period t
CP
648 ns
TCLK Pulse Width t
CH
t
CL
75
75
ns
ns
TCLKI Period t
LP
648 ns
TCLKI Pulse Width t
LH
t
LL
75
75
ns
ns
TSYSCLK Period t
SP
t
SP
t
SP
t
SP
100
100
100
100
648
488
244
122
ns
ns
ns
ns
1
2
3
4
TSYSCLK Pulse Width t
SH
t
SL
50
50
ns
ns
TSYNC or TSSYNC Set Up to TCLK
or TSYSCLK falling
t
SU
20 t
CH
–5 or
t
SH
–5
ns
TSYNC or TSSYNC Pulse Width t
PW
50 ns
TSER, TSIG, TDATA, TLINK,
TPOSI, TNEGI Set Up to TCLK,
TSYSCLK, TCLKI Falling
t
SU
20 ns
TSER, TSIG, TDATA, TLINK,
TPOSI, TNEGI Hold from TCLK,
TSYSCLK, TCLKI Falling
t
HD
20 ns
TCLK, TCLKI or TSYSCLK Rise and
Fall Times
t
R
, t
F
25 ns
Delay TCLKO to TPOSO, TNEGO
Valid
t
DD
50 ns
Delay TCLK to TESO Valid t
D1
50 ns
Delay TCLK to TCHBLK, TCHCLK,
TSYNC, TLCLK
t
D2
50 ns
Delay TSYSCLK to TCHCLK,
TCHBLK, CO
t
D3
75 ns
CI Set Up to TSYSCLK Rising t
SC
20 ns
CI Pulse Width t
WC
50 ns
NOTES:
1. TSYSCLK = 1.544 MHz.
2. TSYSCLK = 2.048 MHz.
3. TSYSCLK = 4.096 MHz
4. TSYSCLK = 8.192 MHz