ADM242: High Speed, +5V, 0.1 uF CMOS RS-232 200kBPS Transceiver with 2 Drivers, 2 Receivers, Shutdown and Enable Pins
The ADM222, ADM232A, ADM242 are a family of high speed RS-232 line drivers/receivers offering transmission rates up to 200 kB/s. Operating from a single +5 V power supply, a highly efficient on-chip charge pump using small (0.1 uF) external capacitors allows RS-232 bipolar levels to be developed. Two RS-232 drivers and two RS-232 receivers are provided on each device.
The devices are fabricated on BiCMOS, an advanced mixed technology process which combines low power CMOS with high speed bipolar circuitry. This allows for transmission rates up to 200 kB/s yet minimizes the quiescent power supply current to under 5 mA.
The ADM232A is a pin-compatible, high speed upgrade for the AD232 and for the ADM232L. It is available in 16-pin DIP and in both narrow and wide surface mount (SOIC) packages.
The ADM222 contains an additional shutdown (SHDN) function which may be used to disable the device thereby reducing the supply current to 0.1 uA. During shutdown, all transmit/ receive functions are disabled. The ADM222 is available in 18-pin DIP and in a wide surface mount (SOIC) package.
The ADM242 combines both shutdown (SHDN) and enable (EN) functions. The shutdown function reduces the supply curent to 0.1 mA. During shutdown, the transmitters are disabled but the receivers continue to operate normally. The enable function allows the receiver outputs to be disabled thereby facilitating sharing a common bus. The ADM242 is available in 18-pin DIP and in a wide surface mount (SOIC) package.
ADM222、ADM232A和ADM242是传输速率高达200 kBps的高速RS-232线路驱动器/接收器系列。采用+5 V单电源供电,片上高效率的充电泵使用小外部电容（0.1 uF）便可实现RS-232双极性电平。每个器件都带两个RS-232驱动器和两个RS-232接收器。
这些器件采用BiCMOS高级混合工艺技术制造,该工艺技术结合了低功耗CMOS与高速双极性电路,可实现高达200 kBps的传输速率,同时可将静态电源电流降至5 mA以下。
ADM232A是AD232和ADM232L的引脚兼容的高速升级版本。这款器件采用16引脚DIP窄体和宽体表面贴（SOIC）封装。
ADM222带有额外的关断（SHDN）功能,用来禁用器件,从而将电源电流降至0.1 uA。在关断期间,所有传送/接收功能都被禁用。ADM222采用18引脚DIP宽体表面贴（SOIC）封装。
ADM242同时带有关断（SHDN）和使能（EN）功能。关断功能将电源电流降至0.1 mA。在关断期间,发送器被禁用,但是接收器继续正常工作。使能功能可禁用接收器输出,以便共享公共总线。ADM242采用18引脚DIP宽体表面贴（SOIC）封装。
ADM242 特点
- 200 kB/s Transmission Rate
- Small (0.1 uF) Charge Pump Capacitors
- Single 5 V Power Supply
- Meets All EIA-232-E and V.28 Specifications
- Two Drivers and Two Receivers
- On-Board DC-DC Converters
- ±9 V Output Swing with 5 V Supply
- ±30 V Receiver Input Levels
- Pin Compatible with MAX222/MAX232A/MAX242
- 200 kBps传输速率
- 小（0.1 uF）充电泵电容
- 5 V单电源供电
- 满足所有EIA-232-E和V.28规格
- 两个驱动器和两个接收器
- 内置DC/DC转换器
- ±9 V输出摆幅,5 V电源
- ±30 V接收器输入电平
- 与MAX222/MAX232A/MAX242引脚兼容
ADM242 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| ADM242AN | 量产 | 16 ld PDIP | 16 | 工业 |
| ADM242ANZ | 量产 | 16 ld PDIP | 16 | 工业 |
| ADM242AR | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| ADM242ARZ | 量产 | 16 ld SOIC - Wide | 16 | 工业 |
| ADM242ARZ-REEL | 量产 | 16 ld SOIC - Wide | 16 | 工业 |