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SC688, SC68C198, SC68C562C1A

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Info of SC688
Info of SC68C198
Info of SC68C562C1A

SC688, SC68C198, SC68C562C1A Selling Leads, Datasheet

MFG:ALPS Package Cooled:SOP16M D/C:2007+

SC688, SC68C198, SC68C562C1A Datasheet download

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Part Number: SC688

MFG: ALPS

Package Cooled: SOP16M

D/C: 2007+

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SC68C198 General Description

The Philips 26C198 Octal UAR T is a single chip CMOSLSI communications device that provides 8 full-duplex asynchronous channels with significantly deeper 16 byte FIFOs, Automatic inband flow control using Xon/Xoff characters defined by the user and address recognition in the wake up mode. Synchronous bus interface is used for all communication between host and OCTART.It is fabricated using Philips 1.0 micron CMOS technology that combines the benefits of low cost, high density and low power consumption.

The operating speed of each receiver and transmitter can beselected independently from one of 22 fixed baud rates, a 16X clock derived from one of two programmable baud rate counters or one of three external 16X clocks (1 available at 1x clock rate). The baud rate generator and counter can operate directly from a crystal or from seven other external or internal clock inputs. The ability to independently program the operating speed of the receiver and transmitter makes the Octal UART particularly attractive for dual speed full duplex channel applications such as clustered terminal systems. The receivers and transmitters are buffered with FIFOs of 16 characters to minimize the potential for receiver overrun and to reduce interrupt overhead. In addition, a handshaking capability and inband flow control are provided to disable a remote UART transmitter when the receiver buffer is full or nearly so.

To minimize interrupt overhead an interrupt arbitration system is included which reports the context of the interrupting UART viadirect access or through the modification of the interrupt vector. The context of the interrupt is reported as channel number, type of device interrupting ( receiver COS etc.) and, for transmitters or receivers, the fill level of the FIFO.

The Octal UART provides a power down mode in which the oscillator is stopped but the register contents are maintained. This results in reduced power consumption of several orders of magnitudes. The Octal UART is fully TTL compatible whenoperating from a single +5V power supply. Operation at 3.3 volts is maintained with CMOS interface levels.

The device also offered in a version which maintains TTL input and output levels while operating with a 3.3 volt power supply.

SC68C198 Maximum Ratings

SYMBOL	PARAMETER	RATING	UNIT
T_A	Operating ambient temperature range	See Note 3	°C
T_STG	Storage temperature range	-65 to +150	°C
V_CC	Voltage from V_DDto GND	-0.5 to +7.0	V
V_SS	Voltage from any pin to GND	-0.5 to V_CC+ 0.5	V
PD5	Power Dissipation at V_CC= 5.0 Volts	1.2	W
PD3	Power Dissipation at V_CC= 3.3 Volts	0.5	W

SC68C198 Features

•Single 3.3v power supply
•Eight Philips industry standard full duplex UART channels
•Sixteen byte receiver FIFOs for each UART
•Sixteen byte transmit FIFOs for each UART
•In band flow control using programmable Xon/Xoff characters
•Flow control using CTSN RTSN hardware handshaking
•Automatic address detection in multi-drop mode
•Three byte general purpose character recognition
•Fast data bus, 30 ns data bus release time, 125 ns bus cycle time
•Programmable interrupt priorities
•Automatic identification of highest priority interrupt pending
•Global interrupt and control registers ease setup and interrupt handling
•Vectored interrupts with programmable interrupt vector formats
Interrupt vector modified with channel number
Interrupt vector modified with channel number and channel type
Interrupt vector not modified
•IACKN and DACKN signal pins
•Watch dog timer for each receiver (64 receive clock counts)
•Programmable Data Formats:
5 to 8 data bits plus parity
Odd, even force or no parity
1, 1.5 or 2 stop bits
•Flexible baud rate selection for receivers and transmitters:
22 fixed rates; 50 230.4K baud or 100 to 460.8K baud
Additional nonstandard rates to 500K baud with internal generators
Two reloadcounters provide additional programmable baud rate generation
External 1x or 16x clock inputs
Simplified baud rate selection
•1 MHz 1x and 16x data rates full duplex all channels.
•Parity, framing and overrun error detection
•False start bit detection
•Line break detection and generation
•Programmable channel mode
Normal(full duplex)
Diagnostic modes
automatic echo
local loop back
emote loop back
•Four I/O ports per UAR T for modem controls, clocks, RTSN, I/Oetc.
All I/O ports equipped with "Change of State Detectors"
•Two global inputs and two global outputs for general purpose I/O
•Power down mode
•On chip crystal oscillator, 28 MHz
•TTL input levels. Outputs switch between full VCC and VSS
•High speed CMOS technology
•68 pin PLCC

SC68C198 Connection Diagram

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