參數(shù)資料
型號(hào)： XR16L2552IJTR-F
廠商： Exar Corporation
文件頁(yè)數(shù)： 43/45頁(yè)
文件大小： 0K
描述： IC UART FIFO 16B DUAL 44PLCC
標(biāo)準(zhǔn)包裝： 500
特點(diǎn)： *
通道數(shù)： 2，DUART
FIFO's： 16 字節(jié)
規(guī)程： RS232
電源電壓： 2.25 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
帶CMOS： 是
安裝類型： 表面貼裝
封裝/外殼： 44-LCC（J 形引線）
供應(yīng)商設(shè)備封裝： 44-PLCC（16.59x16.59）
包裝： 帶卷 (TR)
XR16L2552
7
REV. 1.1.2
2.25V TO 5.5V DUART WITH 16-BYTE FIFO
2.0
FUNCTIONAL DESCRIPTIONS
2.1
CPU Interface
The CPU interface is 8 data bits wide with 3 address lines and control signals to execute data bus read and
write transactions. The L2552 data interface supports the Intel compatible types of CPUs and it is compatible
to the industry standard 16C550 UART. No clock (oscillator nor external clock) is required to operate a data
bus transaction. Each bus cycle is asynchronous using CS#, IOR# and IOW# signals. Both UART channels
share the same data bus for host operations. The data bus interconnections are shown in Figure 3.
.
2.2
5-Volt Tolerant Inputs
The L2552 can accept up to 5V inputs even when operating at 3.3V or 2.5V. But note that if the L2552 is
operating at 2.5V, its VOH may not be high enough to meet the requirements of the VIH of a CPU or a serial
transceiver that is operating at 5V.
2.3
Device Reset
The RESET input resets the internal registers and the serial interface outputs in both channels to their default
state (see the Table 13). An active high pulse of longer than 40 ns duration will be required to activate the
reset function in the device.
2.4
Device Identification and Revision
The L2552 provides a Device Identification code and a Device Revision code to distinguish the part from other
devices and revisions. To read the identification code from the part, it is required to set the baud rate generator
registers DLL and DLM both to 0x00. Now reading the content of the DLM will provide 0x02 to indicate L2552
and reading the content of DLL will provide the revision of the part; for example, a reading of 0x01 means
revision A.
FIGURE 3.
XR16L2552 DATA BUS INTERCONNECTIONS
VCC
(OP2A#)
DSRA#
CTSA#
RTSA#
DTRA#
RXA
TXA
RIA#
CDA#
(OP2B#)
DSRB#
CTSB#
RTSB#
DTRB#
RXB
TXB
RIB#
CDB#
GND
A0
A1
A2
UART_CS#
UART_CHSEL
IOR#
IOW#
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
CS#
CHSEL
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART
Channel A
UART
Channel B
UART_INTB
UART_INTA
INTB
INTA
(RXRDYA#)
TXRDYA#
(RXRDYA#)
TXRDYA#
(RXRDYB#)
TXRDYB#
(RXRDYB#)
TXRDYB#
UART_RESET
RESET
RS-232 Serial Interface
(BAUDOUTB#)
(BAUDOUTA#)
Pins in parentheses become available through the MF# pin. MF# A/B becomes RXRDY# A/B when AFR[2:1] = '10'. MF# A/B becomes OP2# A/B
when AFR[2:1] = '00'. MF# A/B becomes BAUDOUT# A/B when AFR[1:0] = '01'. RXRDY# pins available on 48-TQFP package.
相關(guān)PDF資料
PDF描述
ST16C2550CQ48TR-F IC UART FIFO 16B DUAL 48TQFP
ATMEGA168-15MT1 MCU AVR 16K FLASH 15MHZ 32-QFN
ATMEGA168-15MT MCU AVR 16K FLASH 15MHZ 32-QFN
ST16C1450IQ48-F IC UART FIFO 1B 48TQFP
XR68M752IL32-F IC UART FIFO 64B DUAL 32QFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16L2552IM 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16L2552IM-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2552IMTR-F 制造商:Exar Corporation 功能描述:UART 2-CH 16Byte FIFO 2.5V/3.3V/5V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16L2552IMTR-F
XR16L2750 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART WITH 64-BYTE FIFO
XR16L2750_05 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART WITH 64-BYTE FIFO
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*