參數(shù)資料
型號： XR16C2550IM-F
廠商： Exar Corporation
文件頁數(shù)： 32/37頁
文件大?。?/td> 0K
描述： IC UART FIFO 16B DUAL 48TQFP
標(biāo)準(zhǔn)包裝： 250
特點： *
通道數(shù)： 2，DUART
FIFO's： 16 字節(jié)
規(guī)程： RS232，RS485
電源電壓： 2.97 V ~ 5.5 V
帶故障啟動位檢測功能： 是
帶調(diào)制解調(diào)器控制功能： 是
帶CMOS： 是
安裝類型： 表面貼裝
封裝/外殼： 48-TQFP
供應(yīng)商設(shè)備封裝： 48-TQFP（7x7）
包裝： 托盤
XR16C2550
4
2.97V TO 5.5V DUART WITH 16-BYTE FIFO
REV. 1.0.2
RXRDYB#
-
23
18
O
UART channel B Receiver Ready (active low). This output provides
the RX FIFO/RHR status for receive channel B. See Table 2. If it is
not used, leave it unconnected.
MODEM OR SERIAL I/O INTERFACE
TXA
11
13
7
O
UART channel A Transmit Data. If it is not used, leave it uncon-
nected.
RXA
10
11
5
I
UART channel A Receive Data. Normal receive data input must idle
at logic 1 condition. If it is not used, tie it to VCC or pull it high via a
100k ohm resistor.
RTSA#
32
36
33
O
UART channel A Request-to-Send (active low) or general purpose
output. If it is not used, leave it unconnected.
CTSA#
36
40
38
I
UART channel A Clear-to-Send (active low) or general purpose
input. This input should be connected to VCC when not used. This
input has no effect on the UART.
DTRA#
33
37
34
O
UART channel A Data-Terminal-Ready (active low) or general pur-
pose output. If it is not used, leave it unconnected.
DSRA#
37
41
39
I
UART channel A Data-Set-Ready (active low) or general purpose
input. This input should be connected to VCC when not used. This
input has no effect on the UART.
CDA#
38
42
40
I
UART channel A Carrier-Detect (active low) or general purpose
input. This input should be connected to VCC when not used. This
input has no effect on the UART.
RIA#
39
43
41
I
UART channel A Ring-Indicator (active low) or general purpose
input. This input should be connected to VCC when not used. This
input has no effect on the UART.
OP2A#
31
35
32
O
Output Port 2 Channel A - The output state is defined by the user
and through the software setting of MCR[3]. INTA is set to the active
mode and OP2A# output to a logic 0 when MCR[3] is set to a logic
1. INTA is set to the three state mode and OP2A# to a logic 1 when
MCR[3] is set to a logic 0. See MCR[3]. This output should not be
used as a general output else it will disturb the INTA output function-
ality. If it is not used at all, leave it unconnected.
TXB
12
14
8
O
UART channel B Transmit Data. If it is not used, leave it uncon-
nected.
RXB
9
10
4
I
UART channel B Receive Data. Normal receive data input must idle
at logic 1 condition. If it is not used, tie it to VCC or pull it high via a
100k ohm resistor.
RTSB#
24
27
22
O
UART channel B Request-to-Send (active low) or general purpose
output. If it is not used, leave it unconnected.
CTSB#
25
28
23
I
UART channel B Clear-to-Send (active low) or general purpose
input. This input should be connected to VCC when not used. This
input has no effect on the UART.
DTRB#
34
38
35
O
UART channel B Data-Terminal-Ready (active low) or general pur-
pose output. If it is not used, leave it unconnected.
Pin Description
NAME
40-PDIP
PIN #
44-PLCC
PIN #
48-TQFP
PIN #
TYPE
DESCRIPTION
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