SC28C94 系列 5 V 8 字节 FIFO 四 UART SMD - PLCC-52
Overview
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.
MoreLess
## 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 1.0 M 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
* Programmable channel mode
* Normal full-duplex, automatic echo, local loop back, remote loopback
* Programmable interrupt priorities
* Identification of highest priority interrupt
* Global interrupt register set provides data from interrupting channel
* 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 package
* 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
## Features
电源电压DC 4.50V min
供电电流 35 mA
通道数 4
耗散功率 2800 mW
工作温度Max 85 ℃
工作温度Min -40 ℃
耗散功率Max 2800 mW
电源电压 5 V
电源电压Max 5.5 V
电源电压Min 4.5 V
安装方式 Surface Mount
引脚数 52
封装 LCC-52
封装 LCC-52
工作温度 -40℃ ~ 85℃
产品生命周期 Active
包装方式 Tube
RoHS标准 RoHS Compliant
含铅标准 Lead Free
REACH SVHC版本 2015/12/17
ECCN代码 EAR99
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
SC28C94A1A,512 NXP 恩智浦 | 当前型号 | 当前型号 |
SC28C94A1A,518 恩智浦 | 类似代替 | SC28C94A1A,512和SC28C94A1A,518的区别 |
1848000000 魏德米勒 | 功能相似 | SC28C94A1A,512和1848000000的区别 |