CD40147B数据手册集成电路（IC）的信号开关多路复用器解码器规格书PDF

描述 Description

The CD40147B CMOS encoder features priority encoding of the inputs to ensure that only the highest-order data line is encoded. Ten data input lines (0-9) are encoded to four-line (8, 4, 2, 1) BCD. The highest priority line is line 9. All four output lines are logic 1 (VSS) when all input lines are logic 0. All inputs and outputs are buffered, and each output can drive one TTL low-power Schottky load. The CD40147B is functionally similar to the TTL54/74147 if pin 15 is tied low.

The CD40147B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

特性 Features

• Encodes 10-line to 4-line BCD
• Active low inputs and outputs
• Standardized, symmetrical output characteristics
• 100% tested for quiescent current at 20 V
• 5-V, 10-V, and 15-V parametric ratings
• Meets all requirements of JEDEC Tentative Standard No. 13B, \"Standard Specifications for Description of 'B' Series CMOS Devices\"
• Maximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
• Noise margin (full package temperature range) =      1 V at VDD = 5 V      2 V at VDD = 10 V      2.5 V at VDD = 15 V
• Applications:
• Keyboard encoding
• 10-line to BCD encoding
• Range selection