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參數(shù)資料
| 型號： | MAX3387 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual LVDS Receiver 8-MSOP -40 to 85 |
| 中文描述： | 3V的，【15kV ESD保護，AutoShutdown加的RS - 232收發(fā)器，PDA和手機電話 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 181K |
| 代理商： | MAX3387 |
M
Power-Supply Decoupling
In most circumstances, a 0.1μF bypass capacitor is ade-
quate. In applications that are sensitive to power-supply
noise, decouple V
CC
to ground with a capacitor of the
same value as charge-pump capacitor C1. Connect
bypass capacitors as close to the IC as possible.
Operation Down to 2.7V
Transmitter outputs will meet EIA/TIA-562 levels of
±3.7V with supply voltages as low as +2.7V.
Transmitter Outputs when
Exiting Shutdown
Figure 7 shows two transmitter outputs when exiting
shutdown mode. As they become active, the two trans-
mitter outputs are shown going to opposite RS-232 lev-
els (one transmitter input is high; the other is low). Each
transmitter is loaded with 3k
in parallel with 2500pF.
The transmitter outputs display no ringing or undesir-
able transients as they come out of shutdown. Note that
the transmitters are enabled only when the magnitude
of V- exceeds approximately 3V.
High Data Rates
The MAX3387E maintains the RS-232 ±5.0V minimum
transmitter output voltage even at high data rates.
Figure 8 shows a transmitter loopback test circuit.
Figure 9 shows a loopback test result at 120kbps, and
Figure 10 shows the same test at 250kbps. For Figure
9, all transmitters were driven simultaneously at
120kbps into RS-232 loads in parallel with 1000pF. For
Figure 10, a single transmitter was driven at 250kbps,
and all transmitters were loaded with an RS-232 receiv-
er in parallel with 1000pF.
Interconnection with
3V and 5V Logic
The MAX3387E can directly interface with various 5V
logic families, including ACT and HCT CMOS. The logic
voltage power-supply pin (V
L
) sets the output voltage
level of the receivers and the input thresholds of the
transmitters.
3V, ±15kV ESD-Protected, AutoShutdown Plus
RS-232 Transceiver for PDAs and Cell Phones
12
______________________________________________________________________________________
MAX3387E
5k
R_ IN
R_ OUT
C2-
C2+
C1-
C1+
V-
V+
V
CC
C4
C3
C1
C2
0.1
μ
F
V
CC
FORCEON
FORCEOFF
T_ OUT
T_ IN
GND
V
CC
1000pF
Figure 8. Loopback Test Circuit
2
μ
s/div
T1IN
T1OUT
R1OUT
5V/div
5V/div
5V/div
V
CC
= 3.3V
Figure 9. Loopback Test Results at 120kbps
50
μ
s/div
T2
T1
5V/div
2V/div
V
CC
= 3.3V
C1–C4 = 0.1
μ
F
Figure 7. Transmitter Outputs when Exiting Shutdown
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX3388EEUG | 2.5V, 【15kV ESD-Protected RS-232 Transceivers for PDAs and Cell Phones |
| MAX3389EEUG | 2.5V, 【15kV ESD-Protected RS-232 Transceivers for PDAs and Cell Phones |
| MAX3388E | Dual LVDS Receiver 8-MSOP -40 to 85 |
| MAX3388ECUG | Dual LVDS Receiver 8-MSOP-PowerPAD -40 to 85 |
| MAX3389ECUG | Dual LVDS Receiver 8-MSOP-PowerPAD -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3387ECUG | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3387ECUG+ | 功能描述:RS-232接口集成電路 3V Transceiver for PDAs & Cells RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3387ECUG+ | 制造商:Maxim Integrated Products 功能描述:IC RS-232 TXRX 250KBPS 5.5V TSSOP-24 |
| MAX3387ECUG+T | 功能描述:RS-232接口集成電路 3V Transceiver for PDAs & Cells RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| MAX3387ECUG-T | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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