The TL16C451 and TL16C452 provide single- and dual-channel (respectively) serial interfaces along with a single Centronix-type parallel-port interface. The serial interfaces provide a serial-to-parallel conversion for data received from a peripheral device or modem and a parallel-to-serial conversion for data transmitted by a CPU. The parallel interface provides a bidirectional parallel data port that fully conforms to the requirements for a Centronix-type printer interface. A CPU can read the status of the asynchronous communications element (ACE) interfaces at any point in the operation. The status includes the state of the modem signals (CTS\, DSR\, RLSD\, and RI) and any changes to these signals that have occurred since the last time they were read, the state of the transmitter and receiver including errors detected on received data, and printer status. The TL16C451 and TL16C452 provide control for modem signals (RTS\ and DTR\), interrupt enables, baud rate programming, and parallel-port control signals.

• Integrates Most Communications Card Functions From the IBM PC/ATTM or Compatibles With Single- or Dual-Channel Serial Ports
• TL16C451 Consists of One TL16C450 Plus Centronix Printer Interface
• TL16C452 Consists of Two TL16C450s Plus a Centronix-Type Printer Interface
• Fully Programmable Serial Interface Characteristics:
  • 5-, 6-, 7-, or 8-Bit Characters
  • Even-, Odd-, or No-Parity Bit Generation and Detection
  • 1-, 1 1/2-, or 2 Stop-Bit Generation
  • Programmable Baud Rate (dc to 256 kbit/s)
• Fully Double Buffered for Reliable Asynchronous Operation

IBM PC/AT is a trademark of International Business Machines Corporation.

• Number of channels (#)
• 1
• FIFOs (bytes)
• 0
• Rx FIFO trigger levels (#)
• —
• Tx FIFO trigger levels (#)
• —
• Programmable FIFO trigger levels
• No
• CPU interface
• X86
• Baud rate (max) at Vcc = 1.8 V & with 16X sampling (Mbps)
• —
• Baud rate (max) at Vcc = 2.5 V & with 16X sampling (Mbps)
• —
• Baud rate (max) at Vcc = 3.3 V & with 16X sampling (Mbps)
• —
• Baud rate (max) at Vcc = 5.0 V & with 16X sampling (Mbps)
• 0.256
• Operating voltage (V)
• 5
• Auto RTS/CTS
• No
• Rating
• Catalog
• Operating temperature range (C)
• 0 to 70

TL16C451的完整型号有：TL16C451FN、TL16C451FNR，以下是这些产品的关键参数及官网采购报价：

TL16C451FN，工作温度：0 to 70，封装：PLCC (FN)-68，包装数量MPQ：18个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网TL16C451FN的批量USD价格：4.144（1000+）

TL16C451FNR，工作温度：0 to 70，封装：PLCC (FN)-68，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网TL16C451FNR的批量USD价格：4.144（1000+）

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