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XR19L400 Datasheet Preview

XR19L400 Datasheet

SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER

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XR19L400
SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
APRIL 2018
REV. 1.0.4
GENERAL DESCRIPTION
The XR19L400 (L400) is a highly integrated device that
combines a full-featured single channel Universal
Asynchronous Receiver and Transmitter (UART) and RS-
485 transceivers. The L400 is designed to operate with a
single 3.3V or 5V power supply. The L400 is fully compliant
with RS-485 Standards.
The L400 operates in four different modes: Active, Partial
Sleep, Full Sleep and Power-Save. Each mode can be
invoked via hardware or software. Upon power-up, the
L400 is in the Active mode where the UART and RS-485
transceiver function normally. In the Partial Sleep mode, the
internal crystal oscillator of the UART or charge pump of the
RS-485 transceiver is turned off. In Full Sleep mode, both
the crystal oscillator and the charge pump are turned off.
While the UART is in the Sleep mode, the Power-Save
mode isolates the core logic from the control signals (chip
select, read/write strobes, address and data bus lines) to
minimize the power consumption. The RS-485 receivers
remain active in any of these four modes.
APPLICATIONS
Battery-Powered Equipment
Handheld and Mobile Devices
Handheld Terminals
Industrial Peripheral Interfaces
Point-of-Sale (POS) Systems
FEATURES
Meets true RS-485 standards at 3.3V or 5V operation
Up to 8 Mbps data transmission rate
45us sleep mode exit (charge pump to full power)
ESD protection for RS-485 I/O pins at
+/-15kV - Human Body Model
+/- 8kV - IEC 61000-4-2, Contact Discharge
+/- 15kV - IEC 61000-4-2, Air-Gap Discharge
Software compatible with industry standard 16550 UART
Intel/Motorola bus select
Complete modem interface
Sleep and Power-save modes to conserve battery power
Wake-up interrupt upon exiting low power modes
FIGURE 1. BLOCK DIAGRAM
PwrSave
A2:A0
D7:D0
IOR#
IOW# (R/W#)
CS# (CS#)
INT (IRQ#)
RESET (RESET#)
I/M#
HALF/FULL#
*5 V Tolerant
Inputs
Crystal
Osc/Buffer
BRG
64 Byte
TX FIFO
TX
Charge Pump
UART
64 Byte
RX FIFO
Modem
I/Os
RX
VCC33
CTS#
DSR#
RI#
CD#
RS-485 Transceiver
XR19L400
TX+
TX-
RX+
RX-
1




MaxLinear

XR19L400 Datasheet Preview

XR19L400 Datasheet

SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER

No Preview Available !

XR19L400
SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
FIGURE 2. PIN OUT OF THE DEVICE
REV. 1.0.4
D0
D1
D2
D3
D4
D5
D6
D7
CS#
TEST2
1
2
3
4
5
6
7
8
9
10
XR19L 400
40 - pin QFN
Intel Bus Mode
30 TXA-
29 NC
28 RXA+
27 RXA-
26 C1+
25 C1-
24 NC
23 NC
22 NC
21 VCC33
D0 1
30 TXA-
D1 2
29 NC
D2 3
28 RXA+
D3 4
XR19L400
27 RXA-
D4 5
40-pin QFN
26 C1+
D5
D6
6
7
Motorola Bus Mode
25
24
C1-
NC
D7 8
23 NC
CS# 9
22 NC
TEST2 10
21 VCC33
VCC
GND
ORDERING INFORMATION(1)
PART NUMBER
XR19L400IL40TR-F
OPERATING TEMPERATURE RANGE
-40°C to +85°C
LEAD-FREE
Yes(2)
PACKAGE
40-pin QFN
NOTES:
1. Refer to www.exar.com/XR19L400 for most up-to-date Ordering Information.
2. Visit www.exar.com for additional information on Environmental Rating.
PACKAGING METHOD
Tape and Reel
2


Part Number XR19L400
Description SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
Maker MaxLinear
Total Page 30 Pages
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