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參數(shù)資料
| 型號： | MXL1544CAI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 20/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX MULTIPROTOCOL 28-SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 4/4 |
| 規(guī)程： | RS232 |
| 電源電壓： | 5VDC |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SSOP |
| 包裝： | 帶卷 (TR) |
MXL1544/MAX3175
+5V Multiprotocol, Software-Selectable
Control Transceivers
_______________________________________________________________________________________
9
Detailed Description
The MXL1544/MAX3175 are four-driver/four-receiver
multiprotocol transceivers that operate from a single
+5V supply and the charge pump from the MXL1543.
The MXL1544/MAX3175, along with the MXL1543 and
MXL1344A, form a complete software-selectable DTE
or DCE interface port that supports the V.28 (RS-232),
V.10/V.11 (RS-449, V.36, EIA-530, EIA-530A, X.21, RS-
423), and V.35 protocols. The MXL1544 or MAX3175
usually carries the control signals. The MXL1543 car-
ries the high-speed clock and data signals, and the
MXL1344A provides termination for the clock and data
signals.
The MXL1544/MAX3175 feature a 0.5A no-cable
mode, true fail-safe operation, and thermal shutdown
circuitry. Thermal shutdown protects the drivers against
excessive power dissipation. When activated, the ther-
mal shutdown circuitry places the driver outputs into a
high-impedance state. The MAX3175 deglitching fea-
ture reduces errors in unterminated equipment.
The state of the mode-select pins M0, M1, and M2
determines which serial-interface protocol is selected
(Table 1). The state of the DCE/DTE input determines
whether the transceivers will be configured as a DTE
serial port or a DCE serial port. When the DCE/DTE
input is logic HIGH, driver T3 is activated and receiver
R1 is disabled. When the DCE/DTE input is logic LOW,
driver T3 is disabled and receiver R1 is activated. The
INVERT pin state changes the DCE/DTE functionality
regarding T4 and R4 only. M0, M1, M2, INVERT, and
DCE/DTE are internally pulled up to VCC to ensure logic
HIGH if left unconnected.
VOC
R
VOD
Figure 1. V.11 DC Test Circuit
CL
RL
VO
DA
Figure 3. V.10/V.28 Driver Test Circuit
100pF
15pF
100pF
100
D
A
B
A
R
15pF
DA
R
Figure 2. V.11 AC Test Circuit
Figure 4. V.10/V.28 Receiver Test Circuit
Test Circuits
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