MAX3314ECSA-T Maxim Integrated, MAX3314ECSA-T Datasheet - Page 4

• Manufacturer Part Number: MAX3314ECSA-T
• Description: RS-232 Interface IC
• Manufacturer: Maxim Integrated
• Series: MAX3314Er

Specifications of MAX3314ECSA-T

• Data Rate: 460 Kbps
• Operating Supply Voltage: 4.75 V to 5.25 V
• Supply Current: 30 uA
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: SMD/SMT
• Function: Transceiver
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Number Of Drivers: 1
• Number Of I/os: 1 / 1
• Number Of Receivers: 1
• Propagation Delay Time Ns: 0.15 us
• Shutdown: Yes

±15kV ESD-Protected, 460kbps, 1µA,
RS-232-Compatible Transceiver
The transmitter is an inverting level translator that con-
verts CMOS-logic levels to ±3.7V EIA/TIA-232-compati-
ble levels. It guarantees data rates up to 460kbps with
worst-case loads of 3kΩ in parallel with 1000pF. When
SHDN is driven low, the transmitter is disabled and put
into tristate. The transmitter input does not have a pull-
up resistor. Connect to ground if unused.
The MAX3314E’s receiver converts RS-232 signals to
CMOS-logic output levels. The receiver is rated to
receive signals to ±25V. It will remain active during
shutdown mode.
In shutdown mode, the transmitter output is put into high
impedance (Table 1). This reduces supply current to 1µA.
The time required to exit shutdown is less than 2.5µs.
The capacitor type used is not critical for proper opera-
tion; either polarized or nonpolarized capacitors are
acceptable. If polarized capacitors are used, connect
polarity as shown in the Typical Operating Circuit.
Bypass V
Figure 1 shows the transmitter output when exiting
shutdown mode. The transmitter is loaded with 3kΩ in
4
_______________________________________________________________________________________
PIN
1
2
3
4
5
6
7
8
CC
and V- to ground with at least 0.1µF.
Applications Information
RS-232-Compatible Receivers
MAX3314E Shutdown Mode
NAME
SHDN
ROUT
TOUT
RS-232-Compatible Drivers
GND
Transmitter Outputs When
V
RIN
TIN
V-
Detailed Description
CC
Capacitor Selection
+5V ±5% External Power Supply. Decouple with a 0.1µF capacitor to ground.
Shutdown, Active low (0 = off, 1 = on).
TTL/CMOS Receiver Output
TTL/CMOS Transmitter Input
RS-232-Compatible Transmitter Output
RS-232-Compatible Receiver Input
-5V ±5% External Power Supply. Decouple with a 0.1µF capacitor to ground.
Ground
Exiting Shutdown
parallel with 1000pF. The transmitter output displays no
ringing or undesirable transients as the MAX3314E
comes out of shutdown.
The MAX3314E maintains minimum RS-232-compatible
±3.7V transmitter output voltage even at high data rates.
Figure 2 shows a transmitter loopback test circuit.
Figure 3 shows the loopback test result at 120kbps, and
Figure 4 shows the same test at 250kbps.
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against electrostatic
discharges encountered during handling and assembly.
The MAX3314E driver outputs and receiver inputs have
extra protection against static discharge. 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, Maxim’s E versions keep working without
latchup, whereas competing products can latch and
must be powered down to remove latchup.
ESD protection can be tested in various ways. The trans-
mitter outputs and receiver inputs of the product family
are characterized for protection to the following limits:
• ±15kV using the Human Body Model
• ±8kV using the Contact Discharge method specified
• ±15kV using the IEC 1000-4-2 Air-Gap method
in IEC 1000-4-2
FUNCTION
±15kV ESD Protection
Pin Description
High Data Rates