Rainbow Electronics DS2154 - Manual (Page 63)

DS2154
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AC CHARACTERISTICS – TRANSMIT SIDE (0 ° C to 70 ° C; V
DD
=5V ± 5% for DS2154L;
–40
°
C to + 85
°
C; V
DD
=5V
±
5% for DS2154LN)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
TCLK Period t
CP
488 ns
TCLK Pulse Width t
CH
t
CL
75
75 ns
ns
TCLKI Period t
LP
488 ns
TCLKI Pulse Width t
LH
t
LL
75
75 ns
TSYSCLK Period t
SP
t
SP
122
122 648
448 ns
ns 1
2
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,
TCHBLK, TSYNC, TLCLK t
D2
50 ns
Delay TSYSCLK to TCHCLK,
TCHBLK t
D3
75 ns
See Figures 14–7 to 14–9 for details.
NOTES:
1. TSYSCLK=1.544 MHz.
2. TSYSCLK=2.048 MHz.