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參數(shù)資料
| 型號： | XR88C681JTR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 36/101頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART CMOS DUAL 44PLCC |
| 標(biāo)準(zhǔn)包裝： | 500 |
| 特點(diǎn)： | * |
| 通道數(shù)： | 2，DUART |
| FIFO's： | 1 字節(jié)，3 字節(jié) |
| 電源電壓： | 4.75 V ~ 5.25 V |
| 帶并行端口： | 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) |
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XR88C681
4
Rev. 2.11
PIN DESCRIPTION
44 PLCC
40 PDIP,
CDIP
28 PDIP
Symbol
Type
Description
1
NC
No Connection.
2
1
A0
I
LSB of Address Input.
This input, along with Address Inputs,
A1 - A3 are used to select certain registers within the DUART
device, during READ and WRITE operations with the CPU.
3
2
IP3
(TXCA - I)
(RXCA - Z)
I
Input Port 3.
General Purpose Input - When the DUART is
operating in the I-mode, this input can also be used as the
external clock input for the Channel A Transmitter (TXCA).
When the DUART is operating in the Z-Mode, this input can
be used as the external clock input for the Channel A Receiv-
er (RXCA).
4
3
2
A1
I
Address Input.
5
4
IP1
(-CTSB)
I
Input Port 1.
General Purpose Input - This input can also be
used as the Active Low, “Channel B Clear to Send” input.
(-CTSB)
6
5
3
A2
I
Address Input.
7
6
4
A3
I
MSB of Address Input.
This input, along with Address In-
puts, A0 - A2 are used to select certain registers within the
DUART device, during READ and WRITE operations with the
CPU.
8
7
IP0
(-CTSA)
I
Input 0.
General Purpose Input - This input can also be used
as the active-low, “Channel A Clear-to-Send” input. (-CTSA)
9
8
5
-WR
I
Write Strobe (Active-Low).
A “l(fā)ow” on this input while -CS is
also “l(fā)ow” writes the contents of the Data Bus into the ad-
dressed register, within the DUART. The transfer occurs on
the rising edge of -WR.
10
9
6
-RD
I
Read Strobe (Active Low).
A “l(fā)ow” on this input while -CS is
also “l(fā)ow” places the contents of the addressed DUART regis-
ter, on the data bus.
11
10
7
RXDB
I
Receive Serial Data Input (Channel B).
The least significant
bit of the character is received first. If external receiver clock,
RXCB, is specified, the data is sampled on the rising edge of
this clock.
12
NC
No Connect.
13
11
8
TXDB
O
Transmitter Serial Data Output (Channel B).
The least sig-
nificant bit of the character is transmitted first. This output is
held in the high (marking state) when the transmitter is idle,
disabled, or when the channel is operating in the local LOOP-
BACK mode. If an external transmitter clock is specified,
TXCB, the transmitted data is shifted out of the TSR (Trans-
mitter Shift Register) on the falling the edge of this clock.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR88C681MN-S0968 | 制造商:Exar Corporation 功能描述: |
| XR88C681N/40 | 制造商:EXAR 制造商全稱:EXAR 功能描述:CMOS DUAL CHANNEL UART (DUART) |
| XR88C681P/28 | 制造商:Exar Corporation 功能描述: |
| XR88C681P/28-F | 功能描述:UART 接口集成電路 Dual Channel 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 |
| XR88C681P/40 | 功能描述:UART 接口集成電路 Dual Channel 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 |
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