The ST3243E device consists of 3 drivers, 5 receivers and a dual charge-pump circuit. The device meets the requirements of EIA/TIA and V.28/V.24 communication standards providing high data rate capability and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver input are protected to ±8 kV USING IEC 1000-4-2 contact discharge and ±15 kV using the human body model. The receiver R2 is always active to implement a wake-up feature for serial port.
The ST3243E has a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0 V to 5.5 V supply with a dual charge pump. The device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels.
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 (expert R2B) are shut off, and supply current is reduced to 1 µA.
Disconnecting the serial port or turning off the peripheral drives causes the auto power-down condition to occur.
Auto power-down can be disabled when FORCEON and FORCEOFF are high, and should be done when driving a serial mouse. With auto power-down enabled, the device is activated automatically when a valid signal is applied to any receiver input.
Typical application are in notebook, subnotebook, palmtop computers, battery-powered equipment, hand-held equipment, peripherals and printers.
Key Features
| Description | Version | Size |
|---|---|---|
| DS2695: ± 15 kV ESD protected 3 to 5.5 V, 400 kbps, RS-232 transceiver with auto power-down | 12.1 | 627 KB |
| Description | Version | Size |
|---|---|---|
| Products and Solutions for Factory Automation and Control | 1.0 | 3 MB |
| Part Number | Package | Packing Type | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | Unit Price (US$) * | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|---|---|---|---|---|---|---|---|---|
| ST3243ECTR-E | TSSOP28 9.7 x 4.4 | Tape And Reel | 0 | 70 | 1.29 | 1000 | NEC | EAR99 | MALAYSIA |
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| ST3243ECTR-E | TSSOP28 9.7 x 4.4 | Industrial | Ecopack3 | md_ym-wspc-tssop-wspc-28-wspc-body-wspc-4.4-wspc-pitch-wspc-0.65_ebymuf46jc5.pdf md_ym-wspc-tssop-wspc-28-wspc-body-wspc-4.xml |
