DS2154
(0°C to 70°C; VDD=5V ±=5% for DS2154L;
-40°C to +85°C; VDD=5V ±=5% for DS2154LN)
AC CHARACTERISTICS -
TRANSMIT SIDE
PARAMETER
SYMBOL MIN
TYP
MAX
UNITS NOTES
TCLK Period
tCP
488
ns
ns
ns
ns
ns
TCLK Pulse Width
tCH
tCL
tLP
tLH
tLL
tSP
tSP
tSH
tSL
tSU
75
75
TCLKI Period
488
TCLKI Pulse Width
75
75
TSYSCLK Period
122
122
50
648
448
ns
ns
ns
ns
ns
1
2
TSYSCLK Pulse Width
50
TSYNC or TSSYNC Set Up toTCLK or
TSYSCLK falling
20
tCH-5 or
tSH-5
TSYNC or TSSYNC Pulse Width
tPW
tSU
50
20
ns
ns
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
tHD
20
ns
TCLK, TCLKI, or TSYSCLK Rise and
Fall Times
tR, tF
tDD
25
50
ns
ns
Delay TCLKO to TPOSO, TNEGO
Valid
Delay TCLK to TESO Valid
tD1
tD2
50
50
ns
ns
Delay TCLK to TCHBLK, TCHBLK,
TSYNC, TLCLK
Delay TSYSCLK to TCHCLK,
TCHBLK
tD3
75
ns
See Figures 14-7 to 14-9 for details.
NOTES:
1. TSYSCLK=1.544 MHz.
2. TSYSCLK=2.048 MHz.
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DALLAS [ DALLAS SEMICONDUCTOR ]
