Exar Corp. recently launched a new family of RS-232 (EIA/TIA-232) transceivers designed to operate from 3- to 5.5-V supplies. The XR32220, XR32430, and XR32431 transceivers include an adjustable low-voltage logic interface that simplifies their use in low- and multi-voltage systems.
The XR32220 and XR32431 feature a low-voltage logic pin (VL) for adjusting the transceiver’s logic output levels and input thresholds for compatibility with lower supply voltage logic. The VL range is 1.65 to 5.5 V. The adjustable low-voltage interface eliminates the need for a level shifter/translator between the transceiver and UART or microcontroller.
Features and specs:
- Wide 3- to 5-V supply operation
- 1.65- to 5.5-V logic interface VL pin (XR32220, XR32431)
- Auto on-line circuitry automatically wakes up from a 1-µA shutdown
- Regulated charge pump yields stable RS-232 outputs regardless of VCC variations
- XR32220: 250 kbps minimum transmission rate
- XR32430, XR32431: 250 kbps/460 kbps/1 Mbps minimum transmission rate
The XR32220, XR32430, and XR32431 are available in RoHS-compliant, green/halogen free, space-saving 4 mm × 4 mm QFN (XR32220) and 5 mm × 5 mm QFN (XR32430/31) packages. They cost from $0.74 to $0.94 in 1,000-piece quantities. Demoboards and samples are available at http://www.exar.com/transceivers.
Source: Exar Corp.