CD40147B系列介绍资料

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CD40147B

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10 线至 4 线 BCD 优先级编码器

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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 (V_SS) 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).

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 V_DD = 5 V
     2 V at V_DD = 10 V
     2.5 V at V_DD = 15 V
Applications:
- Keyboard encoding
- 10-line to BCD encoding
- Range selection

Technology family	CD4000
Function	Encoder
Configuration	10
Number of channels	1
Operating temperature range (°C)	-55 to 125
Rating	Catalog

PDIP (N)	16	181.42 mm² 19.3 x 9.4
SOIC (D)	16	59.4 mm² 9.9 x 6

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CD40147B

10 线至 4 线 BCD 优先级编码器

4000-306-326