- 您现在的位置：买卖IC网 > PDF目录1936 > MAX13223EEUP+T (Maxim Integrated Products)IC TXRX RS-232 2TX/2RX 20-TSSOP PDF资料下载
参数资料
| 型号： | MAX13223EEUP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS-232 2TX/2RX 20-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/2 |
| 规程： | RS232 |
| 电源电压： | 3 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
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
相关PDF资料 |
PDF描述 |
|---|---|
| MAX13234EAUP+ | TXRX RS-232 250KBPS 2X2 20TSSOP |
| MAX1329BETL+ | IC DAS 12BIT 300KSPS 40-TQFN-EP |
| MAX13342EEBC+T | IC TXRX USB FS 3WIRE 12-UCSP |
| MAX13410EESA+T | IC TXRX RS-485 LDO/CTRL 8-SOIC |
| MAX1342BETX+ | IC ADC/DAC 12BIT W/FIFO 36WQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1322ECM | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1322ECM+ | 功能描述:模数转换器 - ADC 14-Bit 2Ch 526ksps 3V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1322ECM+T | 功能描述:模数转换器 - ADC 14-Bit 2Ch 526ksps 3V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1322ECM-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX13234EAUP+ | 功能描述:RS-232接口集成电路 3-5.5V 250Kbps RS232 Line Driver/Receiver RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
发布紧急采购，3分钟左右您将得到回复。