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74LVC138ABQ 데이터시트(PDF) 3 Page - NXP Semiconductors |
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3 / 16 page 74LVC138A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 5 — 19 October 2011 3 of 16 NXP Semiconductors 74LVC138A 3-to-8 line decoder/demultiplexer; inverting 5. Pinning information 5.1 Pinning 5.2 Pin description (1) This is not a supply pin. The substrate is attached to this pad using conductive die attach material. There is no electrical or mechanical requirement to solder this pad. However, if it is soldered, the solder land should remain floating or be connected to GND. Fig 4. Pin configuration for SO16 and (T)SSOP16 Fig 5. Pin configuration for DHVQFN16 138 A0 VCC A1 Y0 A2 Y1 E1 Y2 E2 Y3 E3 Y4 Y7 Y5 GND Y6 001aad033 1 2 3 4 5 6 7 8 10 9 12 11 14 13 16 15 001aad035 138 GND(1) Y7 Y5 E3 Y4 E2 Y3 E1 Y2 A2 Y1 A1 Y0 Transparent top view 7 10 6 11 5 12 4 13 3 14 2 15 terminal 1 index area Table 2. Pin description Symbol Pin Description A0 1 address input A1 2 address input A2 3 address input E1 4 enable input (active LOW) E2 5 enable input (active LOW) E3 6 enable input (active HIGH) GND 8 ground (0 V) Y[0:7] 15, 14, 13, 12, 11, 10, 9, 7 output VCC 16 supply voltage |
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