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SC28C94 Dataheets PDF



Part Number SC28C94
Manufacturers NXP
Logo NXP
Description Quad universal asynchronous receiver/transmitter QUART
Datasheet SC28C94 DatasheetSC28C94 Datasheet (PDF)

INTEGRATED CIRCUITS SC28C94 Quad universal asynchronous receiver/transmitter (QUART) Product specification 1998 Aug 19 Replaces SC26C94 of 1995 May 01 and SC68C94 of 1995 May 01 IC17 Data Handbook Philips Semiconductors Philips Semiconductors Product specification Quad universal asynchronous receiver/transmitter (QUART) SC28C94 DESCRIPTION The 28C94 quad universal asynchronous receiver/transmitter (QUART) combines four enhanced Philips Semiconductors industry-standard UARTs with an innova.

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INTEGRATED CIRCUITS SC28C94 Quad universal asynchronous receiver/transmitter (QUART) Product specification 1998 Aug 19 Replaces SC26C94 of 1995 May 01 and SC68C94 of 1995 May 01 IC17 Data Handbook Philips Semiconductors Philips Semiconductors Product specification Quad universal asynchronous receiver/transmitter (QUART) SC28C94 DESCRIPTION The 28C94 quad universal asynchronous receiver/transmitter (QUART) combines four enhanced Philips Semiconductors industry-standard UARTs with an innovative interrupt scheme that can vastly minimize host processor overhead. It is implemented using Philips Semiconductors’ high-speed CMOS process that combines small die size and cost with low power consumption. The operating speed of each receiver and transmitter can be selected independently at one of eighteen fixed baud rates, a 16X clock derived from a programmable counter/timer, or an external 1X or 16X clock. The baud rate generator and counter/timer can operate directly from a crystal or from external clock inputs. The ability to independently program the operating speed of the receiver and transmitter make the QUART particularly attractive for dual-speed channel applications such as clustered terminal systems. Each receiver is buffered with eight character FIFOs (first-in-first-out memories) and one shift register to minimize the potential for receiver overrun and to reduce interrupt overhead in interrupt driven systems. In addition, a handshaking capability is provided to disable a remote UART transmitter when the receiver buffer is full. (RTS control) The 28C94 provides a power-down mode in which the oscillator is stopped and the register contents are stored. This results in reduced power consumption on the order of several magnitudes. The QUART is fully TTL compatible and operates from a single +5V power supply. PIN CONFIGURATIONS VCC A5:0 CEN RDN WRN D7-0 DACKN IACKN RQN RESET X1/CLK X2 RDa-d I/O0a–d I/O1a–d I/O2a–d I/O3a–d TDa-d VSS SD00158 Figure 1. Pin Configuration • Programmable channel mode • Programmable interrupt priorities • Identification of highest priority interrupt • Global interrupt register set provides data from interrupting channel – Normal (full-duplex), automatic echo, local loop back, remote loopback FEATURES • New low overhead interrupt control • All commercial parts meet industrial timing and temperature parameters • Four Philips Semiconductors industry-standard UARTs • Eight byte receive FIFO and eight byte transmit FIFO for each UART • Programmable data format: – 5 to 8 data bits plus parity – Odd, even, no parity or force parity – 1, 1.5 or 2 stop bits programmable in 1/16-bit increments • Baud rate for the receiver and transmitter selectable from: – 23 fixed rates: 50 to 230.4K baud Non-standard rates to 1.0M baud – User-defined rates from the programmable counter/timer associated with each of two blocks – External 1x or 16x clock • Parity, framing, and overrun error detection • False start bit detection • Line break detection and generation ORDERING INFORMATION C G S PACKAGES 48-Pin Plastic Dual In-Line Package (DIP) 52-Pin Plastic Leaded Chip Carrier (PLCC) Package • Vectored interrupts with programmable vector format • IACKN and programmable DTACKN signals • Built-in baud rate generator with choice of 18 rates • Four I/O pins per UART for modem controls, clocks, etc. • Power down mode • High-speed CMOS technology • 52-pin PLCC and 48-pin DIP • Commercial and industrial temperature ranges available • On-chip crystal oscillator • TTL compatible • Single +5V power supply with low power mode • Two multifunction programmable 16-bit counter/timers • 1MHz 16x mode operation • 10ns data bus release time • “Watch Dog” timer for each receiver INDUSTRIAL VCC = +5V +10%, TA = –40oC to +85oC SC28C94A1N SC28C94A1A G# DWG SOT240-1 SOT238-3 1998 Aug 19 2 853–2111 19896 Philips Semiconductors Product specification Quad universal asynchronous receiver/transmitter (QUART) SC28C94 PIN CONFIGURATIONS 48-Pin Dual-In-Line Package X1/CLK TXDD RXDD IRQN A5 A4 A3 A2 A1 1 2 3 4 5 6 7 8 9 48 X2 47 V SS DACKN IACKN 46 45 44 43 42 41 40 39 38 TXDB RESET TXDC RXDC I/O2D I/O1D I/O0D I/O2C I/O1C I/O0C RXDB D7 8 9 52-Pin PLCC Package RDN CEN V SS VCC WRN A1 A2 A3 48 7 6 5 4 3 2 1 52 A0 51 50 49 47 46 A5 45 IRQN 44 RXDD 43 TXDD 42 X1/CLK 41 X2 40 VSS 39 I/O3D 38 RESET 37 TXDC 36 RXDC 35 I/O2D 34 I/O1D D6 10 D5 11 D4 12 D3 13 VSS 14 D2 15 I/O3B 16 D1 17 D0 18 RXDA 19 TXDA 20 21 I/O2B 22 I/O1B 23 I/O0B 24 I/O3A 25 I/O2A 26 I/O1A 27 I/O0A 28 V SS 29 I/O0C 30 I/O1C 31 32 I/O2C I/O3C 33 I/O0D A0 10 WRN 11 VSS 12 VCC 13 CEN 14 RDN 15 DACKN 16 IACKN 17 TXDB 18 RXDB 19 D7 20 D6 21 D5 22 D4 23 D3 24 37 VSS 36 35 34 33 32 31 30 29 28 27 26 I/O0A I/O1A I/O2A I/O0B I/O1B I/O2B TXDA RXDA D0 D1 D2 25 VSS A4 SD00159 Figure 2. Pin Configurations (cont.) ABSOLUTE MAXIMUM RATINGS1, 2 SYMBOL TA TSTG VCC VS PD PARAMETER Operating ambient temperature Storage temperature range Voltag.


SC26L198 SC28C94 SC28L194


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