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參數(shù)資料
| 型號(hào)： | MAX13223EEUP+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Buffer和線驅(qū)動(dòng) |
| 英文描述： | ±70V Fault-Protected, 3.0V to 5.5V, 2Tx/2Rx RS-232 Transceiver; Package: TSSOP;20 pin;45 mm² ; Temperature: -40°C to +85°C |
| 中文描述： | DUAL LINE TRANSCEIVER, PDSO20 |
| 封裝： | 6.50 X 4.40 MM, ROHS COMPLIANT, TSSOP-20 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 254K |
| 代理商： | MAX13223EEUP+ |
MAX13223E
AutoShutdown
The MAX13223E achieves 1A supply current with
Maxim’s AutoShutdown feature, which operates when
FORCEON is low and FORCEOFF is high. When the
device senses no valid signal levels on both receiver
inputs for > 30s (typ), the onboard charge pump and
drivers are shut off, reducing supply current to 1A.
This occurs if the RS-232 cable is disconnected or the
connected peripheral transmitters are turned off. The
device turns on again when a valid level is applied to
either RS-232 receiver input. As a result, the system
saves power. Table 2 summarizes the MAX13223E’s
operating modes. FORCEON and FORCEOFF override
AutoShutdown. When neither control is asserted, the IC
selects between these states automatically, based on
receiver input levels. Figure 6a shows the input levels
and Figure 6b shows the timing diagram for
AutoShutdown operation.
Software-Controlled Shutdown
If direct software control is desired, INVALID can be
used to indicate a DTR or Ring indicator signal.
Connect FORCEOFF and FORCEON together to bypass
AutoShutdown; therefore, the line acts as a SHDN input.
±70V Fault-Protected, 3.0V to 5.5V,
2Tx/2Rx RS-232 Transceiver
8
_______________________________________________________________________________________
MAX13223E
UART
FORCEON
FORCEOFF
POWER-
MANAGEMENT
UNIT OR CPU
INVALID
RS-232
Figure 5. Interface Under Control of PMU
Table 1. Receiver Control Truth Table
EN
OPERATION MODE
R_OUT
0
Active (FORCEON), or
Active (AutoShutdown)
Active
0
Shutdown (
FORCEOFF), or
Shutdown (AutoShutdown)
Active and
asserted low
1
Shutdown status is don’t care
High impedance
RECEIVER
INPUT
AutoShutdown, TRANSMITTER DISABLED,
1
μA SUPPLY CURRENT
-2.7V
b)
a)
-0.3V
+2.7V
+0.3V
0
INDETERMINATE
TRANSMITTER ENABLED, INVALID HIGH
tINVL
tINVH
tWU
V+
V-
0
+2.7V
+0.3V
-0.3V
-2.7V
0
VCC
RECEIVER
INPUT
VOLTAGE
(V)
INVALID
OUTPUT
(V)
INVALID
REGION
Figures 6a and 6b. Trip Levels for Entering and Exiting
AutoShutdown
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX13223EEUP+ | 功能描述:RS-232接口集成電路 3-5.5V 250Kbps RS232 Line Driver/Receiver 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: |
| MAX13223EEUP+ | 制造商:Maxim Integrated Products 功能描述:IC, RS232 TXRX, 250KBPS, 5.25V, TSSOP-20 |
| MAX13223EEUP+T | 功能描述:RS-232接口集成電路 3-5.5V 250Kbps RS232 Line Driver/Receiver 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: |
| MAX1322ECM | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1322ECM+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 2Ch 526ksps 3V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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