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參數(shù)資料
| 型號(hào)： | MAX3172EAI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 4/19頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TERM/TXRX MULTIPROT 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(dòng)器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS232 |
| 電源電壓： | 3 V ~ 3.6 V |
| 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) |
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MAX3172/MAX3174
+3.3V Multiprotocol Software-Selectable
Cable Terminators and Transceivers
12
______________________________________________________________________________________
with a minimum of a 100 resistor (Figure 6). This resis-
tor, although not required, prevents reflections from
corrupting transmitted data.
In Figure 7, the MAX3172/MAX3174 are used to termi-
nate the V.11 receiver. Internal to the MAX3172/
MAX3174, S1 is closed and S2 is open to present a
104 typical differential resistance and high-Z com-
mon-mode impedance. S3 opens to disable the
MAX3170’s internal V.28 termination.
The V.11 specification allows for signals with common-
mode variations of ±7V with differential signal ampli-
tudes from 2V to 6V. Also, data rates may be as high as
10Mbps. The MAX3172/MAX3174 maintain steady ter-
mination impedance between 100 and 110 over
these conditions.
V.35 Termination
Figure 8 shows a standard V.35 interface. The genera-
tor and the load must both present a 100 ±10 differ-
ential impedance and a 150 ±15 common-mode
impedance (as shown by the resistive T-networks in
Figure 8). The V.35 driver generates a current output
(typically ±11mA) that develops an output voltage
between 440mV and 660mV across the load termina-
tion networks.
R6
10k
R8
5k
R3
127
R2
52
R1
52
A′
B′
C′
A
B
GND
R5
30k
R7
10k
R4
30k
MAX3172
MAX3174
MAX3170
S3
S2
S1
RECEIVER
50
125
50
125
A′
B′
C′
A
B
C
GENERATOR
BALANCED
INTERCONNECTING
CABLE
TERMINATION
RECEIVER
LOAD
Figure 8. Typical V.35 Interface
Figure 7. V.11 Termination and Internal Resistance Networks
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