MAX13171E Datasheet, PDF (35/38 Pages) Maxim Integrated Products – Multiprotocol, Pin-Selectable Data Interface Chipset

Multiprotocol, Pin-Selectable
Data Interface Chipset
Complete Multiprotocol X.21 Interface
A complete DTE-to-DCE interface operating in X.21
mode is shown in Figure 30. The MAX13171E is used to
generate the clock and data signals, and the
MAX13173E generates the control signals and local
loopback (LL). The MAX13175E is used to terminate the
clock and data signals to support the V.11 protocol for
cable termination. The control signals do not need
external termination.
ESD Protection
ESD-protection structures are incorporated on all pins to
protect against electrostatic discharges encountered
during handling and assembly. The driver outputs and
receiver inputs of the MAX13171E/MAX13173E have
extra protection against static electricity. Maxim’s engi-
neers have developed state-of-the-art structures to pro-
tect these pins against ESD of ±15kV without damage.
The ESD structures withstand high ESD in all states: nor-
mal operation, shutdown, and powered down. After an
ESD event, the MAX13171E/MAX13173E/MAX13175E
keep working without latchup or damage. ESD protec-
tion can be tested in various ways. The Electrical
Characteristics table shows the various limits for each
device and they are characterized for protection to the
following methods:
• Human Body Model
• Contact Method specified in IEC 61000-4-2
• Air-Gap Discharge Method specified in IEC 61000-4-2
SERIAL
CONTROLLER
TXD
SCTE
TXC
RXC
RXD
RTS
DTR
DCD
DSR
CTS
LL
DTE
MAX13171E
T1
T2
T3
R3
R2
R1
MAX13173E
T1
T2
T3
R1
R2
R3
D4
T4
MAX13175E
TXD
SCTE
MAX13175E
104Ω
104Ω
104Ω
TXC
104Ω
RXC
104Ω
RXD
RTS
DTR
DCD
DSR
CTS
LL
DCE
MAX13171E
R3
R2
R1
T1
T2
T3
MAX13173E
R3
R2
R1
T3
T2
T1
R4
T4
SERIAL
CONTROLLER
TXD
SCTE
TXC
RXC
RXD
RTS
DTR
DCD
DSR
CTS
LL
Figure 30. DCE-to-DTE X.21 Interface
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