Comparison between industrial and 16C/68C UARTs

The table below compares our industrial (SC26, SC68, and SC28) and 16C-core (16CxxxB and 68CxxxB) UARTs.

Feature	Industrial	16CxxxB/68CxxxB
Supply Voltage	3.3V and 5.0V	2.5V, 3.3V, and 5.0V
Temperature Range	-40 to +85 oC 1	-40 to +85 oC 2
Channels	1, 2, 4, and 8	1, 2, and 4
Synchronous Bus Interface	Yes 3	No
Independent Transmit & Receive Baud Rates	Yes	No
Maximum FIFO Depth	Up to 256 Bytes	64 Bytes
Transmit and Receive FIFOs	Yes 4	Yes 4
In-Band (Software) Flow Control (Xon/Xoff)	Yes	Yes
Out-of-Band (Hardware) Flow Control (RTS/CTS)	Yes	Yes
Multi-Drop Mode	Auto	Software Required
Character Recognition (Also Used for Xon/Xoff)	Yes	Yes
Bus Cycle Time (Read Strobe + Read Cycle Delay)	40ns to 125ns	43ns
Bus Interface	Intel, Motorola, or Both	Intel, Motorola, or Both
Interrupt Priority	Programmable	Fixed
Programmable Interrupt Vector Format	Yes	No
IACKN and DACKN Signal Pins	Yes	No
Transmitter & Receiver Software Reset	Yes	No
Independent Transmitter & Receiver Enable/Disable	Yes	No
Maximum Baud Rate	3.125Mbps	5Mbps
Watch Dog Timer	Yes	No
Programmable Data Format	5 to 8 Data Bits	5 to 8 Data Bits
Parity Format	Odd, Even, Forced, None	Odd, Even, Forced, None
Number of Stop Bits	1, 1-1/2, or 2	1, 1-1/2, or 2
Baud Rate Selection	Programmable	Programmable
Parity, Framing, & Overrun Detection	Yes	Yes
Line Break Detection & Generation	Yes	Yes
Automatic Echo of Character Received	Yes	No
Local Loop Back	Yes	Yes
Remote Loop Back	Yes	No
Loop Back Error Check	Yes	No
Programmable I/O Port Pins	Yes	No
Infrared IrDA Interface	No	Yes
Change-of-State Detection	CD, RI, CTS, DSR and all I/O pins	CD, RI, CTS, DSR
Power Down Mode	Yes 5	Yes 5
Clock Frequency Using On-Chip Oscillator and External Crystal	Up to 16.2MHz	Up to 24MHz
TTL Input Levels	Yes	Yes
Software	Similar Structures but Different Low-Level Routines
Receiver Time-Out Mode	Yes	Yes

1. Also available in commercial temperature range
2. 16C and 68C have industrial temperature at commercial pricing
3. Synchronous use requires a clock from host
4. FIFO depth varies depending on UART
5. Clock is shutoff, but register contents remain

If you have other questions about the differences between our industrial and commercial UARTs, please contact us.