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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(yè)數(shù)： | 12/12頁(yè) |
| 文件大?。?/td> | 254K |
| 代理商： | MAX13223EEUP+ |
Applications Information
Capacitor Selection
The capacitor type used for C1–C4 is not critical for
proper operation; either polarized or nonpolarized
capacitors may be used. The charge pump requires
0.1F capacitors for 3.3V operation. For other supply
voltages, see Table 3 for required capacitor values. Do
not use values smaller than those listed in Table 3.
Increasing the capacitor values (e.g., by a factor of 2)
reduces ripple on the transmitter outputs and slightly
reduces power consumption. C2, C3, and C4 can be
increased without changing C1’s value. However, do
not increase C1 without also increasing the values
of C2, C3, and C4 to maintain the proper ratios (C1
to the other capacitors). When using the minimum
required capacitor values, make sure the capacitor
value does not degrade excessively with temperature.
If in doubt, use capacitors with a larger nominal value.
The capacitor’s equivalent series resistance (ESR) usu-
ally rises at low temperatures and influences the
amount of ripple on V+ and V-.
Power-Supply Decoupling
In most circumstances, a 0.1F VCC bypass capacitor is
adequate. In applications that are sensitive to power-sup-
ply noise, decouple VCC to ground with a capacitor of the
same value as the charge-pump capacitor C1. Connect
bypass capacitors as close to the IC as possible.
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. Each transmitter is loaded with 3k
Ω 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.
MAX13223E
±70V Fault-Protected, 3.0V to 5.5V,
2Tx/2Rx RS-232 Transceiver
_______________________________________________________________________________________
9
Table 2. AutoShutdown Control
INPUTS
OUTPUTS
FORCEOFF
FORCEON
VALID RECEIVER INPUT
LEVEL
INVALID
OUTPUT
OPERATION MODE
T_OUT
0
X
No
0
Shutdown (Forced Off)
High-Z
0
X
Yes
1
Shutdown (Forced Off)
High-Z
1
0
No
0
Shutdown (AutoShutdown)
High-Z
1
0
Yes
1
Active (AutoShutdown)
Active
1
No
0
Active (Forced On)
Active
1
Yes
1
Active (Forced On)
Active
Table 3. Required Capacitor Values
VCC (V)
C1, CBYPASS (F)
C2, C3 (F)
C4 (F)
3.0 to 3.6
0.1
1
4.5 to 5.5
0.047
0.33
1
X = Don’t Care.
40
μs/div
5V/div
2V/div
T2OUT
T1OUT
VCC = +3.3V
C1–C4 = 0.1
μF
FORCEON =
FORCEOFF
Figure 7. Transmitter Outputs when Exiting Shutdown or
Powering Up
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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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