TRSF23243 3V 至 5.5V 双路 RS-232 端口
The TRSF23243 consists of two ports, each containing three line drivers and five line receivers, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). This device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. This combination of drivers and receivers matches that needed for two typical serial ports used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, this device includes an always-active noninverting output (ROUT2) per port, which allows applications using the ring indicator to transmit data while the device is powered down. The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew-rate.
Flexible control options for power management are available when either or both serial ports are inactive. The auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs of its respective port are disabled. If FORCEOFF is set low, both drivers and receivers (except ROUT2) are shut off, and the supply current is reduced to 1 µA. Disconnecting the serial port or turning off the peripheral drivers causes the auto-powerdown condition to occur.
Auto-powerdown can be disabled when FORCEON and FORCEOFF are high and should be done when driving a serial mouse. With auto-powerdown enabled, the RS-232 port is activated automatically when a valid signal is applied to any respective receiver input. The INV output is used to notify the user if an RS-232 signal is present at any receiver input. INV is high (valid data) if any receiver input voltage is greater than 2.7 V or less than -2.7 V or has been between -0.3 V and 0.3 V for less than 30 µs. INV is low (invalid data) if all receiver input voltages are between -0.3 V and 0.3 V for more than 30 µs.
| TRSF23243 | |
| Data Rate(kbps) | 250 |
| Drivers Per Package | 6 |
| Receivers Per Package | 10 |
| ESD HBM(kV) | +/-15 |
| Supply Voltage(s)(V) | 3.3 or 5.0 |
| ICC(Max)(mA) | 2 |
| Operating Temperature Range(°C) | 0 to 70 |
| Pin/Package | 48SSOP, 48TSSOP |
| Approx. Price (US$) | 3.05 | 1ku |
| Rating | Catalog |
TRSF23243 特性
- Single-Chip and Single-Supply Interface forTwo IBM PC/AT Serial Ports
- Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards
- Operates With 3-V to 5.5-V VCC Supply
- Always-Active Noninverting Receiver Output (ROUT2) Per Port
- Operates Up To 250 kbit/s
- Low Standby Current . . . 1 µA Typical
- External Capacitors . . . 4 × 0.22 µF
- Accepts 5-V Logic Input With 3.3-V Supply
- Allows for Flexible Power Down of Either Serial Port
- Serial-Mouse Driveability
- RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM)
- APPLICATIONS
- Battery-Powered Systems
- Notebooks
- Laptops
- Palmtop PCs
- Hand-Held Equipment
TRSF23243 芯片订购指南
| 器件 | 状态 | 温度 | 价格 | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| TRSF23243CDB | ACTIVE | 0 to 70 | 1.10 | 1ku | SSOP (DB) | 28 | 80 | TUBE | |
| TRSF23243CDBG4 | ACTIVE | -40 to 85 | 1.10 | 1ku | SSOP (DB) | 28 | 80 | TUBE | |
| TRSF23243CDBR | ACTIVE | 0 to 70 | 0.90 | 1ku | SSOP (DB) | 28 | 2000 | LARGE T&R | |
| TRSF23243CDBRG4 | ACTIVE | 0 to 70 | 0.90 | 1ku | SSOP (DB) | 28 | 2000 | LARGE T&R |
TRSF23243 质量与无铅数据
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| TRSF23243CDB | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF23243CDB | TRSF23243CDB |
| TRSF23243CDBG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF23243CDBG4 | TRSF23243CDBG4 |
| TRSF23243CDBR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF23243CDBR | TRSF23243CDBR |
| TRSF23243CDBRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF23243CDBRG4 | TRSF23243CDBRG4 |
TRSF23243 应用技术支持与电子电路设计开发资源下载
- TRSF23243 数据资料 dataSheet 下载.PDF
- TI 德州仪器RS-232 产品选型与价格 . xls
- Analog Signal Chain Guide (8.62 MB)
- Industrial Interface IC Solutions (101 KB)
