- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10618 > MAX3430CSA+ (Maxim Integrated Products)IC TXRX RS-485 3.3V 8-SOIC PDF資料下載
參數(shù)資料
| 型號： | MAX3430CSA+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS-485 3.3V 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 1/1 |
| 規(guī)程： | RS485 |
| 電源電壓： | 3 V ~ 3.6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1407 (CN2011-ZH PDF) |
MAX3430
±80V Fault-Protected, Fail-Safe,
1/4-Unit Load, +3.3V RS-485 Transceiver
10
______________________________________________________________________________________
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range. The
second, a thermal shutdown circuit, forces the driver
outputs into a high-impedance state if the die tempera-
ture exceeds +160°C. Normal operation resumes when
the die temperature cools by +140°C, resulting in a
pulsed output during continuous short-circuit conditions.
Hot-Swap Capability
Hot-Swap Inputs
Inserting circuit boards into a hot, or powered backplane
may cause voltage transients on DE, RE, and receiver
inputs A and B that can lead to data errors. For example,
upon initial circuit board insertion, the processor under-
goes a power-up sequence. During this period, the high-
impedance state of the output drivers makes them
unable to drive the MAX3430 enable inputs to a defined
logic level. Meanwhile, leakage currents of up to 10A
from the high-impedance output, or capacitively coupled
noise from VCC or GND, could cause an input to drift to
an incorrect logic state. To prevent such a condition from
occurring, the MAX3430 features hot-swap input circuitry
on DE to safeguard against unwanted driver activation
during hot-swap situations. When VCC rises, an internal
pulldown circuit holds DE low for at least 10s, and until
the current into DE exceeds 200A. After the initial
power-up sequence, the pulldown circuit becomes
transparent, resetting the hot-swap tolerable input.
Hot-Swap Input Circuitry
At the driver enable input (DE), there are two NMOS
devices, M1 and M2 (Figure 9). When VCC ramps from
0, an internal 15s timer turns on M2 and sets the SR
latch, which also turns on M1. Transistors M2, a 2mA
current sink, and M1, a 100A current sink, pull DE to
GND through a 5.6k
resistor. M2 pulls DE to the dis-
abled state against an external parasitic capacitance
up to 100pF that may drive DE high. After 15s, the
timer deactivates M2 while M1 remains on, holding DE
low against three-state leakage currents that may drive
DE high. M1 remains on until an external current source
overcomes the required input current. At this time, the
SR latch resets M1 and turns off. When M1 turns off, DE
reverts to a standard, high-impedance CMOS input.
Whenever VCC drops below 1V, the input is reset.
VCC
TIMER
DE
(HOT SWAP)
15
s
100
A
M1
M2
5.6k
2mA
Figure 9. Simplified Structure of the Driver Enable Pin (DE)
DI
RO
DE
A
B
RE
RO
DI
DE
RE
DE
D
R
BB
B
A
120
120
D
R
MAX3430
RE
Figure 10. Typical RS-485 Network
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SR38-4P-3P | CONN PLUG 3POS MALE SILVER |
| MAX13237EETE+ | TXRX RS-232 3MBPS 1X1 16TQFN |
| IL3585E | TXRX ISO PROFIBUS RS485 16SOIC |
| VI-2WM-IW-F2 | CONVERTER MOD DC/DC 10V 100W |
| VE-BWK-MX-F4 | CONVERTER MOD DC/DC 40V 75W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3430CSA+ | 功能描述:RS-485接口IC Fail-Safe 1/4-Unit 3.3V Transceiver RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX3430CSA+T | 功能描述:RS-485接口IC Fail-Safe 1/4-Unit 3.3V Transceiver RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX3430CSA-T | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MAX3430CSD | 制造商:Maxim Integrated Products 功能描述:+/-80V FAULT-PROTECTED, FAIL-SAFE, 1/4-UNIT L - Rail/Tube |
| MAX3430EPA | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。