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參數(shù)資料
| 型號(hào)： | MAX3238CAI |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 12/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX RS232 250KBPS 28-SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 46 |
| 類型： | 線路收發(fā)器 |
| 驅(qū)動(dòng)器/接收器數(shù)： | 5/3 |
| 規(guī)程： | RS232 |
| 電源電壓： | 3 V ~ 5.5 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： | 管件 |
Power-Supply Decoupling
In applications that are sensitive to power-supply noise,
decouple VCC to ground with a capacitor of the same
value as capacitors C2, C3, and C4. Connect the
bypass capacitor as close to the IC as possible.
Transmitter Outputs when
Exiting Shutdown
Figure 5 shows two transmitter outputs when exiting
shutdown mode. As they become active, the outputs
are shown going to opposite RS-232 levels (one trans-
mitter input is high, the other is low). Each transmitter is
loaded with 3k
in parallel with 2500pF. The transmitter
outputs display no ringing or undesirable 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 MAX3238 maintains the RS-232 ±5.0V minimum
transmitter output voltage even at high data rates.
Figure 6 shows a transmitter loopback test circuit.
Figure 7 shows a loopback test result at 120kbps, and
Figure 8 shows the same test at 250kbps. For Figure 7,
all transmitters were driven simultaneously at 120kbps
into RS-232 loads in parallel with 1000pF. For Figure 8,
a single transmitter was driven at 250kbps, and all
transmitters were loaded with an RS-232 receiver in
parallel with 1000pF.
Interconnection
with 3V and 5V Logic
The MAX3238 can directly interface with various 5V-
logic families, including ACT and HCT CMOS. See
Table 4 for more information on possible combinations
of interconnections.
MAX3238
+3.0V to +5.5V, 1A, up to 250kbps, True
RS-232 Transceiver with AutoShutdown Plus
_______________________________________________________________________________________
9
VCC = 3.3V
C1 - C4 = 0.1
F
5
s/div
2V/div
T2OUT
T1OUT
FORCEON =
FORCEOFF
Figure 5. Transmitter Outputs when Exiting Shutdown or
Powering Up
Table 4. Logic Family Compatibility with
Various Supply Voltages
SYSTEM
POWER-
SUPPLY
VOLTAGE
(V)
VCC
SUPPLY
VOLTAGE
(V)
COMPATIBILITY
3.3
Compatible with all CMOS families.
5
Compatible with all TTL and CMOS
families.
5
3.3
Compatible with ACT and HCT
CMOS, and with AC, HC, or
CD4000 CMOS.
MAX3238
5k
R_ IN
R_ OUT
C2-
C2+
C1-
C1+
V-
V+
VCC
C4
C3*
C1
C2
VCC
FORCEOFF
T_ OUT
T_ IN
GND
VCC
*C3 CAN BE RETURNED TO VCC OR GND.
FORCEON
1000pF
Figure 6. Loopback Test Circuit
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3238CAI+ | 功能描述:RS-232接口集成電路 3-5.5V 250kbps Transceiver 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: |
| MAX3238CAI+T | 功能描述:RS-232接口集成電路 3-5.5V 250kbps Transceiver 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: |
| MAX3238CAI-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: |
| MAX3238CDB | 功能描述:RS-232接口集成電路 3-5.5V Multichannel Line Drvr/Rcvr 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: |
| MAX3238CDB | 制造商:Texas Instruments 功能描述:IC DVR/RCV RS-232MULTCH28-SSOP 制造商:Texas Instruments 功能描述:IC, DVR/RCV RS-232MULTCH28-SSOP 制造商:Texas Instruments 功能描述:IC, DVR/RCV RS-232MULTCH28-SSOP; Device Type:Line Driver / Receiver; Interface Type:RS232; No. of Drivers:5; Supply Voltage Min:3V; Supply Voltage Max:5.5V; Driver Case Style:SSOP; No. of Pins:28; Operating Temperature Min:0C; ;RoHS Compliant: Yes |
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