Overview
Information | High-Performance 3.3V Octal UART |
---|---|
Data Bus Interface | Intel, Motorola |
# of Channels | 8 |
Max Data Rate 5V (Mbps) | 6.25 |
Max Data Rate 3.3V (Mbps) | 4 |
Max Data Rate 2.5V (Mbps) | na |
Max Data Rate 1.8V (Mbps) | na |
Tx FIFO (Bytes) | 64 |
Rx FIFO (Bytes) | 64 |
Auto Flow Control | ✔ |
Auto RS-485 Half-Duplex Control | ✔ |
Multidrop (9-bit) Mode | |
Fractional Baud Rate Generator | |
Power Down Mode | ✔ |
Supply Voltage Range VCC (V) | 2.97 to 5.5 |
Auto RTS/CTS | ✔ |
Package | QFP-100 |
FIFO Level Counters | ✔ |
Selectable/ Programable Trigger Levels | P |
IrDA Sup | ✔ |
5V Tolerant Inputs | ✔ |
Max UART/GPIO Input Voltage (V) | 5.5 |
Max UART/GPIO Output Voltage (V) | VCC |
Temperature Range (°C) | -40 to 85 |
MaxLinear's XR16L788 (formerly numbered XR16L758) is a highly integrated device designed for communications systems with high bandwidth requirements in remote access servers, hubs and routers, factory automation and process control, and Point-of-Sale (POS) systems. At 3.3V (5V+ tolerant), the device is first in a new generation of devices that leverages MaxLinear's strong serial communications design expertise, and the strong market acceptance of this product series.
Joining a robust product portfolio, the XR16L788 has several innovative features including a global interrupt output pin with global interrupt source registers that provide complete status on all eight UART channels which speeds up interrupt parsing. The global interrupt source registers are designed to make the software device drivers more efficient thus reduce CPU's bandwidth requirement in multi-channel systems.
In addition, the device has individual UART channel control, soft-reset, simultaneous registers initialization, RTS/CTS or DTR/DSR hardware flow control with 16 selectable hysteresis, software (Xon/Xoff) flow control with detection indicators and RS-485 half-duplex direction control output with programmable turn-around delay. The turn-around delay of 0 to 15 bit-time is absolutely required for compensating signal propagation delay in long cabling networks. The 8-bit data bus facility supports Intel or Motorola based system designs. The device has 64-byte transmit and receive FIFOs (first-in, first-out) as well as FIFO level counters, programmable TX and RX FIFO trigger levels, serial data rate of up to 6.25 Mbps, and Infrared (IrDA 1.0) data encoder/decoder capabilities.
- Simultaneous UART channels initialization
- Transmit and receive FIFO level counters
- Sleep-mode with wake-up indication
- Automatic Xon/Xoff software flow control
- Data rate up to 6.25 Mbps
- Infrared (IrDA 1.0) data encoder/decoder
- Programmable Tx and Rx FIFO trigger levels
- Automatic RTS/CTS or DTR/DSR flow control
- Pb-Free, RoHS Compliant Versions Offered
- Network management
- Factory automation and process control
- Point-of-sale systems
- Ethernet network to serial ports
- Remote access servers
Documentation & Design Tools
Type | Title | Version | Date | File Size |
---|---|---|---|---|
Data Sheets | XR16L788 High Performance 2.97V to 5.5V Octal UART | 1.2.3 | July 2008 | 1 MB |
Application Notes | DAN-190, MaxLinear UARTs in RS-485 Applications | R01 | July 2023 | 2.4 MB |
Application Notes | AN-204, UART Sleep Mode | 1.0.0 | June 2010 | 515.8 KB |
Application Notes | DAN-170, Migrating to EXAR’s Fifth Generation UARTS: XR16L784/788 | 1.0.0 | August 2004 | 41.2 KB |
Application Notes | DAN-126, XR16L788 vs. SC28L198 and SCC2698B | 1.0.0 | June 2002 | 21.4 KB |
User Guides & Manuals | Evaluation Board User's Manual | 7.0.1 | August 2003 | 25 KB |
Software: Drivers | DOS | 1.0.0 | December 2009 | 4 KB |
Software: Drivers | Linux 2.4 | 1.0.0.0 | December 2009 | 23.4 KB |
Software: Drivers | Linux 2.6 | 1.0.0.0 | December 2009 | 10.7 KB |
Software: Drivers | Linux 2.6.13 | 1.0.0 | December 2009 | 10.8 KB |
Software: Drivers | Linux 2.6.18 | 1.0.0 | December 2009 | 11.6 KB |
Software: Drivers | Linux 2.6.18 | 1.0.0 | December 2009 | 12.1 KB |
Software: Drivers | Linux 2.6.21 | 1.0.0 | December 2009 | 11.6 KB |
Software: Drivers | Windows 2000 & XP | 4.0.2.0 | December 2009 | 687.2 KB |
Software: Drivers | Windows NT | 1.0.0.0 | December 2009 | 1.4 MB |
Software: Drivers | Windows XP | 4.0.2.0 | December 2009 | 644.5 KB |
Software: Drivers | Windows XP & 2000 | 1.3.0.0 | December 2009 | 61 KB |
Product Brochures | Interface Brochure | R01 | June 2024 | 3.6 MB |
Schematics & Design Files | PCI Eval Board Schematic | 1.1.0 | August 2007 | 168.7 KB |
Schematics & Design Files | ISA Eval Board Schematic | 7.2.0 | August 2007 | 135.4 KB |
Quality & RoHS
Part Number | RoHS | Exempt | RoHS | Halogen Free | REACH | TSCA | MSL Rating / Peak Reflow | Package |
---|---|---|---|---|---|---|---|
XR16L788CQ-F | N | Y | Y | Y | Y | L3 / 250ᵒC | MQFP100 14x20 |
XR16L788IQ-F | N | Y | Y | Y | Y | L3 / 250ᵒC | MQFP100 14x20 |
XR16L788IQTR-F | N | Y | Y | Y | Y | L3 / 250ᵒC | MQFP100 14x20 |
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Parts & Purchasing
Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
---|---|---|---|---|---|---|
XR16L788CQ | MQFP100 14x20 | 0 | 70 | OBS | ||
XR16L788CQ-F | MQFP100 14x20 | 0 | 70 | OBS | ||
XR16L788CQTR-F | MQFP100 14x20 | 0 | 70 | OBS | XR16L788CQ-F | |
XR16L788IQ | MQFP100 14x20 | -40 | 85 | OBS | ||
XR16L788IQ-F | MQFP100 14x20 | -40 | 85 | OBS | ||
XR16L788IQTR-F | MQFP100 14x20 | -40 | 85 | OBS |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
Pkg Code | Details | Quantities | Dimensions |
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MQFP100 14x20 |
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Notifications
FAQs & Support
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.
Submit a Technical Support Question As a New Question
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Please check that all the following conditions are satisfied first.
- no interrupts pending (ISR bit-0 = 1)
- modem inputs are not toggling (MSR bits 0-3 = 0)
- RX input pin is idling HIGH • divisor (the value in DLL register) is non-zero
- TX and RX FIFOs are empty
Be sure sleep mode bit has been set to 1. If there are multiple UART channels, the sleep conditions must be true for all channels.
See more on Sleep Mode in AN204 UART Sleep Mode.
Yes. Note: some devices do have powersave mode. If UART goes into powersave mode, then the registers are not accessible.
See more on Sleep Mode in AN204 UART Sleep Mode.
Read LSR register to check whether the UART receives the data or not.
- If LSR value is 0x60, it means that either UART receiver FIFO doesn’t receive the data or the data in receiver FIFO has been read out before the read of LSR.
- If LSR value is 0x00, it means data is still in the THR (clock doesn’t oscillate to transmit data).
- If LSR value is 0xFF, it means either UART is in powersave mode or UART is powered off. For those devices with powersave mode, be sure that UARTS are not in powersave mode.
See more on Sleep Mode in AN204 UART Sleep Mode.
- Check whether the register set can be accessed.
- Check whether the crystal is oscillating fully.
- Check whether the data can be transmitted in internal loopback mode.
See more on Sleep Mode in AN204 UART Sleep Mode.
Videos
MxL UARTs Auto RS-485 Direction Control
This video describes how the automatic RS-485 half-duplex direction control feature in MaxLinear UARTs reduces driver development and frees up CPU/MCU loading. This feature eliminates the need to monitor the status of the UART’s transmit shift register and automatically switches MaxLinear RS-485 transceivers from the transmit mode to the receive mode. This video summarizes the content in application note DAN-190.