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| 型号： | MAX3318EUP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/15页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 460KBPS 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： | 2.25 V ~ 3 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) |
MAX3316–MAX3319
2.5V, 1A, 460kbps,
RS-232-Compatible Transceivers
8
_______________________________________________________________________________________
MAX3317 Shutdown Mode
Supply current falls to less than 1A in shutdown mode
(SHDN = low). When shut down, the device’s charge
pumps are turned off, V+ is pulled down to VCC, V- is
pulled to ground, and the transmitter outputs are disabled
(high impedance). The time required to exit shutdown is
typically 30s, as shown in Figure 2. Connect SHDN to
VCC if the shutdown mode is not used; SHDN has no
effect on R_OUT.
MAX3318/MAX3319
AutoShutdown Plus Mode
Maxim’s AutoShutdown Plus feature on the MAX3318/
MAX3319 allows the supply current to fall to 1A. These
devices will enter the AutoShutdown Plus mode if
FORCEOFF is high, FORCEON is low, and they do not
sense a valid signal transition on any receiver or trans-
mitter input for 30 seconds. This may occur if the RS-232
cable is disconnected or if the peripheral transmitters
are turned off, and the UART driving the transmitter
inputs is inactive. The system turns on again when a
valid transition is applied to any RS-232 receiver or
transmitter input. As a result, the system saves power
without changes to the existing BIOS or operating system.
Figure 4a depicts valid and invalid RS-232 receiver volt-
age levels. INVALID indicates the receiver input’s condi-
tion and is independent of FORCEON and FORCEOFF
states. Figure 3 and Table 1 summarize the operating
modes of the MAX3318/MAX3319. FORCEON and
FORCEOFF override AutoShutdown Plus circuitry. When
neither control is asserted, the IC selects between these
states automatically, based on the last receiver or trans-
mitter edge received.
X
VALID RECEIVER
LEVEL
Active
R_OUT
No
Yes
X
RECEIVER OR
TRANSMITTER
EDGE WITHIN
30s
High-Z
Active
High-Z
T_OUT
Shutdown
(AutoShutdown Plus)
0
1
Normal Operation
(AutoShutdown Plus)
0
1
Normal Operation
(Forced On)
1
Shutdown (Forced
Off)
X
0
OPERATION
STATUS
FORCEON
FORCEOFF
No
Yes
No
X
Yes
Active
X
No
Yes
X
High-Z
Active
High-Z
Active
Shutdown
(AutoShutdown)
INVALID**
Normal Operation
(AutoShutdown)
INVALID**
Shutdown
INVALID*
1
Normal Operation
INVALID*
1
Normal Operation
INVALID*
1
Table 1. Output Control Truth Table (MAX3318/MAX3319)
Table 2. Shutdown and Enable Control
Truth Table (MAX3317)
X = Don’t care
*INVALID connected to FORCEON
**INVALID connected to FORCEON and FORCEOFF
SHDN
EN
T_OUT
R_OUT
0
High-Z
Active
0
1
High-Z
1
0
Active
1
Active
High-Z
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3318IDB | 功能描述:RS-232接口集成电路 2.5V 460-Kbps Transceiver 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: |
| MAX3318IDBE4 | 功能描述:RS-232接口集成电路 2.5V 460-Kbps Transceiver 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: |
| MAX3318IDBG4 | 功能描述:RS-232接口集成电路 2.5V 460-Kbps RS- 232 Transceiver 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: |
| MAX3318IDBR | 功能描述:RS-232接口集成电路 2.5V 460-Kbps Transceiver 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: |
| MAX3318IDBRE4 | 功能描述:RS-232接口集成电路 2.5V 460-Kbps Transceiver 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: |
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