TRSF3243 符合 RS-232 的 3V 至 5.5V 多通道线路驱动器/接收器
The TRSF3243 consists of three line drivers, 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 provides the electrical interface between an asynchronous communication controller and the serial-port connector. 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 (ROUT2B), 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 1 Mbit/s and an increased slew-rate range of 24 V/us to 150 V/us.
Flexible control options for power management are available when the serial port is 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 are disabled. If FORCEOFF is set low, both drivers and receivers (except ROUT2B) are shut off, and the supply current is reduced to 1 uA. 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 device is activated automatically when a valid signal is applied to any receiver input. The INVALID output is used to notify the user if an RS-232 signal is present at any receiver input. INVALID 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 us. INVALID is low (invalid data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 us. Refer to Figure 5 for receiver input levels
| TRSF3243 | |
| Data Rate(kbps) | 1000 |
| Drivers Per Package | 3 |
| Receivers Per Package | 5 |
| ESD HBM(kV) | +/-15 |
| Supply Voltage(s)(V) | 3.3 or 5.0 |
| ICC(Max)(mA) | 1 |
| Operating Temperature Range(°C) | -40 to 85 |
| Pin/Package | 28SSOP, 28TSSOP |
| Approx. Price (US$) | 1.45 | 1ku |
| Rating | Catalog |
| Footprint | MAX3243 |
TRSF3243 特性
- Operates With 3-V to 5.5-V VCC Supply
- Always-Active Noninverting Receiver Output (ROUT2B)
- Low Standby Current . . . 1 uA Typ
- External Capacitors . . . 4 × 0.1 uF
- Accepts 5-V Logic Input With 3.3-V Supply
- Inter-Operable With SN65C3238, SN75C3238
- Supports Operation From 250 kbit/s to
1 Mbit/s - RS-232 Bus-Pin ESD Protection Exceeds
±15 kV Using Human-Body Model (HBM) - Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
- APPLICATIONS
- Battery-Powered Systems
- PDAs
- Notebooks
- Laptops
- Palmtop PCs
- Hand-Held Equipment
TRSF3243 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 |
| TRSF3243CDB | ACTIVE | 0 to 70 | 1.10 | 1ku | SSOP (DB) | 28 | 80 | TUBE | |
| TRSF3243CDBG4 | ACTIVE | -40 to 85 | 1.10 | 1ku | SSOP (DB) | 28 | 80 | TUBE | |
| TRSF3243CDBR | ACTIVE | 0 to 70 | 0.90 | 1ku | SSOP (DB) | 28 | 2000 | LARGE T&R | |
| TRSF3243CDBRG4 | ACTIVE | 0 to 70 | 0.90 | 1ku | SSOP (DB) | 28 | 2000 | LARGE T&R |
TRSF3243 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 |
| TRSF3243CDB | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF3243CDB | TRSF3243CDB |
| TRSF3243CDBG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF3243CDBG4 | TRSF3243CDBG4 |
| TRSF3243CDBR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF3243CDBR | TRSF3243CDBR |
| TRSF3243CDBRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRSF3243CDBRG4 | TRSF3243CDBRG4 |
TRSF3243 应用技术支持与电子电路设计开发资源下载
- TRSF3243 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)