DS2406
DS2406 EQUIVALENT CIRCUIT Figure 11
1-Wire Interface
PIO Channel
Activity
Latch
Edge
Detector
"1"
DATA
PIO
Q
D
to PIO-
Control
RX
TX
Q
Reset
5 µA
Typ.
Ω
10 M
Typ.
D
Q
Q
1-Wire DATA
Ω
100
from PIO-
Control
MOSFET
R
Ground
Ground
Channel
Flip-Flop
BUS MASTER CIRCUIT Figure 12
A) Open Drain
V
PUP
12V
V
DD
VP0300L
OR
VP0106N3
OR
BSS110
BUS MASTER
10 k Ω
10 k Ω
DS5000 OR 8051-
EQUIVALENT
S
D
5 kΩ
Open Drain
Port Pin
RX
TX
S
D
to data connection
of DS2406
D
S
2N7000
D
S
470 pF
PGM
Capacitor added to reduce
coupling on data line due to
programming signal switching
2N7000
2N7000
The interface is reduced to the5kΩ pull-up resistor if one does not intend to program the EPROM cells.
B) Standard TTL
12V
(10 mA min.)
V
DD
V
PUP
BUS MASTER
TTL-Equivalent
PROGRAMMING PULSE
5 k
Ω
Port Pins
RX
to data connection
of DS2406
TX
5 kΩ
The diode and programming circuit are not required if one does not intend to program the EPROM cells.
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DALLAS [ DALLAS SEMICONDUCTOR ]
