OX16C950B
Intelligent Single Channel UART
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Baud rates up to 15 Mbps in normal mode and
60Mbps in external 1x clock mode
Single full-duplex asynchronous channel
128-byte deep transmitter / receiver FIFO
The OX16C950B is a single-channel ultra-high
performance UART offering data rates up to 15Mbps
and 128-deep transmitter and receiver FIFOs. Deep
FIFOs reduce CPU overhead and allow utilisation of
higher data rates.
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Fully software compatible with industry standard
16C550 type UARTs
It is software compatible with the widely used industry-
standard 16C550 type devices and compatibles, as well
as other OX16C95x family devices. It is pin-compatible
with the TL16C550B/C, TL16C750 and ST16C650
devices.
Pin compatible with TL16C550B/C, ST16C650 and
TL16C750
IBM PC/AT compatible
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Readable FIFO levels
Flexible clock prescaler from 1 to 31.875
In addition to increased performance and FIFO size, the
OX16C950B also provides enhanced features including
improved flow control. Automated software flow control
using Xon/Xoff and automated hardware flow control
using CTS#/RTS# and DSR#/DTR# prevent FIFO over-
run. Flow control and interrupt thresholds are fully
programmable and readable, enabling programmers to
fine-tune the performance of their system. FIFO levels
are readable to facilitate fast driver applications.
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Isochronous mode using external 1x baud rate
clock up to 60Mbps
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9-bit data framing as well as 5,6,7 and 8
Detection of bad data in the receiver FIFO
Automated in-band flow control using
programmable Xon/Xoff characters
Transmitter and receiver can be disabled
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Automated out-of-band flow control using CTS# /
RTS# and DSR# / DTR#
The addition of software reset enables recovery from
unforeseen error conditions allowing drivers to restart
gracefully. The OX16C950B supports 9-bit data frames
used in multi-drop industrial protocols. It also offers
multiple external clock options for isochronous
applications, e.g. ISDN, xDSL.
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Readable in-band and out-of-band flow control
status
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Programmable special character detection
Arbitrary trigger levels for receiver and transmitter
FIFO interrupts and automatic in-band and out-of-
band flow control
The OX16C950B is ideally suited to PC applications,
such as high-speed COM port add-in cards which
enable PC users to take advantage of the maximum
performance of analogue modems or ISDN terminal
adapters. It is also suitable for any equipment requiring
high speed RS232/RS422/RS485 interfaces. The
OX16C950B also has a low operating current and sleep
mode for battery powered applications.
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Transmitter idle interrupt (shift register and FIFO
both empty)
Optional Infra-red (IrDA) receiver and transmitter
operation
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RS-485 buffer enable signals
Software channel reset
Four byte device ID
Sleep mode (low operating current)
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System clock up to 60 MHz
3.3v / 5 volts operation
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44 PLCC and 48 TQFP packages
