TRS3318 具有 +/-15KV ESD 保护的 2.5V 460Kbps RS-232 收发器
The TRS3318 is a dual-driver, dual-receiver, RS-232 compatible transceiver. The device features auto-powerdown plus and enhanced electrostatic discharge (ESD) protection integrated into the chip. Driver output and receiver input are protected to ±8 kV using the IEC 61000-4-2 Air-Gap Discharge method, ±8 kV using the IEC 61000-4-2 Contact Discharge method, and ±15 kV using the Human-Body Model (HBM).
The device operates at a data rate of 460 kbps. The transceiver has a proprietary low-dropout driver output stage enabling RS-232-compatible operation from a 2.25-V to 3-V supply with a dual charge pump. The charge pump requires only four 0.1-µF capacitors and features a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting.
The TRS3318 achieves a 1-µA supply current using the auto-powerdown feature. This device automatically enters a low-power power-down mode when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 s. The device turns on again when it senses a valid transition at any driver or receiver input. Auto-powerdown saves power without changes to the existing BIOS or operating system.
This device is available in two space-saving packages: 20-pin SSOP and 20-pin TSSOP.
Flexible control options for power management are featured when the serial port and driver inputs are inactive. The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to 1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown plus enabled, the device activates automatically when a valid signal is applied to any receiver or driver 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 µs (typical number). INVALID is low (invalid data) if all receiver input voltage are between -0.3 V and 0.3 V for more than 30 µs (typical number).
| TRS3318 | |
| Data Rate(kbps) | 460 |
| Drivers Per Package | 2 |
| Receivers Per Package | 2 |
| ESD HBM(kV) | +/-15 |
| Supply Voltage(s)(V) | 2.25 to 3.0 |
| ICC(Max)(mA) | 2 |
| Operating Temperature Range(°C) | -40 to 85,0 to 70 |
| Pin/Package | 20SSOP, 20TSSOP |
| Approx. Price (US$) | 0.90 | 1ku |
| Rating | Catalog |
| Footprint | MAX3318 |
TRS3318 特性
- ESD Protection for RS-232 I/O Pins
- ±15 kV Human-Body Model (HBM)
- ±8 kV IEC 61000-4-2, Contact Discharge
- ±8 kV IEC 61000-4-2, Air-Gap Discharge
- 300-µA Operating Supply Current
- 1-µA Low-Power Standby (With Receivers Active) Mode
- Designed to Transmit at a Data Rate of 460 kbps
- Auto-Powerdown Plus Option Features Flexible Power-Saving Mode
- Operates From a Single 2.25-V to 3-V VCC Supply
- APPLICATIONS
- Battery-Powered Systems
- PDAs
- Cellular Phones
- Notebooks
- Hand-Held Equipment
- Pagers
TRS3318 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 |
| TRS3318IPW | ACTIVE | 0 to 70 | 1.10 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| TRS3318IPWG4 | ACTIVE | -40 to 85 | 1.10 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| TRS3318IPWR | ACTIVE | 0 to 70 | 0.90 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R | |
| TRS3318IPWRG4 | ACTIVE | 0 to 70 | 0.90 | 1ku | TSSOP (PW) | 20 | 2000 | LARGE T&R |
TRS3318 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 |
| TRS3318IPW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRS3318IPW | TRS3318IPW |
| TRS3318IPWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRS3318IPWG4 | TRS3318IPWG4 |
| TRS3318IPWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRS3318IPWR | TRS3318IPWR |
| TRS3318IPWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | TRS3318IPWRG4 | TRS3318IPWRG4 |
TRS3318 应用技术支持与电子电路设计开发资源下载
- TRS3318 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)
