DS2406 View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated
Part Name
Description
MFG CO.
'DS2406' PDF : 30 Pages View PDF
DS2406 EQUIVALENT CIRCUIT Figure 11
1-Wire Interface
DATA
RX
5 µA
Typ.
Ground
TX
100 Ω
MOSFET
to PIO-
Control
1-Wire DATA
from PIO-
Control
DS2406
PIO Channel
Activity
Latch "1"
QD
Edge
Detector
PIO
Q
Reset
DQ
10 MΩ
Typ.
RQ
Channel
Flip-Flop
Ground
BUS MASTER CIRCUIT Figure 12
A) Open Drain
VPUP
VDD
BUS MASTER
DS5000 OR 8051-
EQUIVALENT
Open Drain
RX
Port Pin
10 k Ω
5 kΩ
SD
2N7000 D
TX
PGM
2N7000 S
12V
10 k Ω
S
D
D 470 pF
VP0300L
OR
VP0106N3
OR
BSS110
to data connection
of DS2406
S
2N7000
Capacitor added to reduce
coupling on data line due to
programming signal switching
The interface is reduced to the5kΩ pull-up resistor if one does not intend to program the EPROM cells.
B) Standard TTL
VDD
BUS MASTER
VPUP
12V
(10 mA min.)
TTL-Equivalent
Port Pins
RX
TX
5 kΩ
5 kΩ
PROGRAMMING PULSE
to data connection
of DS2406
The diode and programming circuit are not required if one does not intend to program the EPROM cells
18 of 30
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