Features: Added feature in devices with top mark date code of "C2 YYWW" and newer:
0 ns address hold time
` 2.25 to 5.5 Volt Operation w/ 5 Volt Tolerant Inputs
` ST16C450/550/580/650A Software Compatible
` Intel, Motorola or PC Mode 8-bit Bus Interface
` Up to 3.125 Mbps Data Rate at 5 Volt Operation
` 32-byte Transmit and Receive FIFOs
` Automatic RS485 Half-Duplex Control Output
` Automatic Hardware (RTS/CTS) Flow Control
` Hardware Flow Control Hysteresis
` Automatic Software (Xon/Xoff) Flow Control
` Infrared (IrDA) Encoder/Decoder Enable Input
` Programmable Infrared Encoder Pulse Width
` Sleep Mode with Wake-up Indicator via interruptApplication· Battery Operated Electronics
· Internet Appliances
· Handheld Terminal
· Personal Digital Assistants
· Cellular Phones DataPort
· Wireless Infrared Data Communications SystemsPinout
Specifications
| CH |
1 |
| CPUInterface |
Intel or Motorola |
| Data Rate@5/3.3/2.5V |
3.1/2.0/1.5 |
| Tx/RxFIFO(Bytes) |
32/32 |
| Tx/RxFIFOCtrs |
No |
| Tx/RxFIFOINT Trig |
4 Levels/ 4 Levels |
| AutoRTS/CTS |
Yes |
| IrDaSup |
Yes |
| 5VTolInputs |
Yes |
| Sup V |
2.25-5.5 |
| Pkgs |
TQFP-48 |
Power Supply Range.................................................................................... 7 Volts
Voltage at Any Pin................................................................................... -0.5 to 7V
Operating Temperature.................................................................... -40 to +85
Storage Temperature..................................................................... -65 to +150
Package Dissipation ...................................................................................500 mW
Thermal Resistance (7x7x1 mm 48-TQFP)......theta-ja = 59/W, theta-jc = 16/WDescription
The XR16L6511 is a 2.5V, 3.3V and 5V Universal Asynchronous Receiver and Transmitter (UART) with 5V tolerant inputs. This new device supports Intel and Motorola data bus interface and is software compatible to industry standard XR16C450, XR16C550, ST16C580, and ST16C650A UARTs.
The XR16L651 has 32 bytes of TX and RX FIFOs and is capable of operating up to serial data rate of 2 Mbps at 3.3V supply voltage. The internal registers include the XR16C550 register set plus Exar's enhanced registers for additonal features to support today's highly demanding data communication needs. The enhanced features include automatic hardware and software flow control, selectable TX and RX trigger levels, and wireless infrared (IrDA) encoder/decoder.
The device provides a new capability to give user the ability to program the wireless infrared encoder output pulse width, hence, reduces the power consumption of the handheld unit.
The XR16L651 device comes in in a small 7x7x1mm 48-pin TQFP package with commercial and industrial temperature ranges.
NOTE: 1Covered by US Patents #5,649,122 and #5,949,787
For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.
XR16L651 Data Sheet
