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參數(shù)資料
| 型號(hào)： | XR19L200IL32-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 1/40頁 |
| 文件大小： | 0K |
| 描述： | IC UART/TXRX RS232 32QFN |
| 標(biāo)準(zhǔn)包裝： | 490 |
| 特點(diǎn)： | * |
| 通道數(shù)： | 1，UART |
| FIFO's： | 16 字節(jié) |
| 規(guī)程： | RS232 |
| 電源電壓： | 3 V ~ 5.5 V |
| 帶自動(dòng)流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動(dòng)位檢測(cè)功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-QFN 裸露焊盤（5x5） |
| 包裝： | 托盤 |
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
XR19L200
SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
JULY 2007
REV. 1.0.2
GENERAL DESCRIPTION
The XR19L200 (L200) is a highly integrated device that
combines
a
single
channel
Universal
Asynchronous
Receiver
and
Transmitter
(UART)
and
an
RS-232
transceiver. The L200 is designed to operate with a single
3.3V or 5V power supply. The L200 is fully compliant with
EIA/TIA-232-F Standards from a +3.0V to +5.5V power
supply. The device operates at 250 Kbps data rate with
worst case 3K ohms load. Both RS-232 driver outputs and
receiver inputs can operate in harsh electrical environments
of +/-15V without damage and can survive multiple +/-15kV
ESD on the RS-232 lines, while maintaining RS-232 output
levels.
The L200 operates in three different modes: Awake, Partial
Sleep, and Full Sleep. Each mode can be invoked via
hardware or software. In the Awake mode, all functions are
active. In the Partial Sleep mode, the internal crystal
oscillator or charge pump is turned off. In Full Sleep mode,
the internal crystal oscillator and the charge pump is shut
down. All the RS-232 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 EIA/TIA-232-F Standards from a 3.0 V to 5.5V
operation
Up to 250 Kbps data transmission rate
45us sleep mode exit (charge pump to full power)
ESD protection for RS-232 I/O pins at
■ +/-15kV - Human Body Model
■ +/-15kV - IEC 61000-4-2, Air-Gap Discharge
■ +/- 8kV - IEC 61000-4-2, Contact Discharge
Software compatible with industry standard 16550 UART
Intel/Motorola bus select
Quarter-modem interface (TXD, RXD)
Sleep modes to conserve battery power
Wake-up interrupt upon exiting low power modes
FIGURE 1. BLOCK DIAGRAM
XR19L200
UART
RS-232 Transceiver
In
te
l
or
M
o
to
ro
la
B
u
s
I
n
te
rf
ac
e
A2:A0
D7:D0
IOR#
IOW# (R/W#)
CS#
INT (IRQ#)
RESET (RESET#)
I/M#
Crystal
Osc/Buffer
XT
AL1
XT
AL2
BRG
16 Byte
TX FIFO
16 Byte
RX FIFO
Modem
I/Os
U
A
RT
Re
gis
te
rs
TX
RX
Charge Pump
TXD
5K
RXD
AC
P
C2+
C2-
C1+
C1-
VC
C
(3
.0
t
o
5.
5V
)
*5 V
Tolerant
Inputs
GN
D
VREF+
VREF-
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