MAX3173CAI-T Maxim Integrated, MAX3173CAI-T Datasheet - Page 10

• Manufacturer Part Number: MAX3173CAI-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3171, MAX3173r

Specifications of MAX3173CAI-T

• Data Rate: 240 Kbps
• Operating Supply Voltage: 3.3 V
• Supply Current: 23 mA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Number Of Drivers: 3
• Number Of Receivers: 3

Figure 6. Cable-Selectable Multiprotocol DCE/DTE Port
+3.3V Multiprotocol 3Tx/3Rx
Software-Selectable Control Transceivers
Figure 7. Typical V.11 Interface
10
______________________________________________________________________________________
MODE
V.35
RS-449, V.36
RS-232
MAX3171
MAX3173
GENERATOR
CABLE WIRING FOR
MODE SELECTION
CTS(DTE)
RTS(DCE)
PIN 18
PIN 7
N.C.
PIN 7
R3
13 5
A
B
C
DSR(DTE)
DTR(DCE)
10 8
INTERCONNECTING
R2
PIN 21
PIN 7
PIN 7
N.C.
BALANCED
CABLE
R1
DCE/DTE SELECTION
MODE
DTE
DCE
CABLE WIRING FOR
DCD(DCE)
DCD(DTE)
D3
22 6
DSR(DCE)
DTR(DTE)
TERMINATION
A′
B′
C′
100Ω
D2
23 20 19 4
CABLE
MIN
PIN 25
PIN 7
N.C.
CTS(DCE)
RTS(DTE)
D1
LOAD
V
CC
RECEIVER
1
7
DB-25 CONNECTOR
M0
M0
18 21
M1
M1
MAX3172
MAX3174
M2
R4
The V.10 interface (Figure 10) is an unbalanced single-
ended interface capable of driving a 450Ω load. The
V.10 driver generates a ±4V (min) V
A' and C' when unloaded and a minimum of ±0.9
V
trip threshold is defined between +300mV and -300mV
with the input impedance characteristic shown in
Figure 8.
The MAX3171/MAX3173 V.10 mode receiver has a
threshold between +25mV and +300mV to ensure that
the receiver has proper fail-safe operation (see Fail-
D4
ODO
DCE/DTE
DCE/DTE
25
voltage with a 450Ω load. The V.10 receiver input
TXD(DCE)
RXD(DTE)
R3
16 3
SCTE(DCE)
RXC(DTE)
R2
9 17
R1
TXC(DTE)
TXC(DCE)
D3
12 15 11 24 14 2
SCTE(DTE)
RXC(DCE)
D2
ODO
V.10 Interface
RXD(DCE)
TXD(DTE)
D1
voltage across
MAX3170
✕