The SN65C3243 and SN75C3243 consist 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/µs to 150 V/µs.
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 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 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 µs. INVALID is low (invalid data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for receiver input levels
| SN65C3243 | |
| 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 | 28SOIC, 28SSOP, 28TSSOP |
| Approx. Price (US$) | 1.80 | 1ku |
| Rating | Catalog |
| Footprint | MAX3243 |
| 器件 | 状态 | 温度 | 价格 | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| SN65C3243PW | ACTIVE | -40 to 85 | 1.65 | 1ku | TSSOP (PW) | 28 | 90 | TUBE | CB3243 |
| SN65C3243PWE4 | ACTIVE | -40 to 85 | 1.65 | 1ku | TSSOP (PW) | 28 | 90 | TUBE | CB3243 |
| SN65C3243PWG4 | ACTIVE | -40 to 85 | 1.65 | 1ku | TSSOP (PW) | 28 | 90 | TUBE | CB3243 |
| SN65C3243PWR | ACTIVE | -40 to 85 | 1.40 | 1ku | TSSOP (PW) | 28 | 2000 | LARGE T&R | CB3243 |
| SN65C3243PWRE4 | ACTIVE | -40 to 85 | 1.40 | 1ku | TSSOP (PW) | 28 | 2000 | LARGE T&R | CB3243 |
| SN65C3243PWRG4 | ACTIVE | -40 to 85 | 1.40 | 1ku | TSSOP (PW) | 28 | 2000 | LARGE T&R | CB3243 |
| 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 |
| SN65C3243PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN65C3243PW | SN65C3243PW |
| SN65C3243PWE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN65C3243PWE4 | SN65C3243PWE4 |
| SN65C3243PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN65C3243PWG4 | SN65C3243PWG4 |
| SN65C3243PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN65C3243PWR | SN65C3243PWR |
| SN65C3243PWRE4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN65C3243PWRE4 | SN65C3243PWRE4 |
| SN65C3243PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | SN65C3243PWRG4 | SN65C3243PWRG4 |
