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74HC244BQ 数据表(PDF) 3 Page - NXP Semiconductors |
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74HC244BQ 数据表(HTML) 3 Page - NXP Semiconductors |
3 / 18 page 74HC_HCT244 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet Rev. 4 — 24 September 2012 3 of 18 NXP Semiconductors 74HC244; 74HCT244 Octal buffer/line driver; 3-state 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 DIP20, SO20, (T)SSOP20 Fig 5. Pin configuration DHVQFN20 74HC244 74HCT244 1OE VCC 1A0 2OE 2Y0 1Y0 1A1 2A0 2Y1 1Y1 1A2 2A1 2Y2 1Y2 1A3 2A2 2Y3 1Y3 GND 2A3 001aae011 1 2 3 4 5 6 7 8 9 10 12 11 14 13 16 15 18 17 20 19 001aae012 74HC244 74HCT244 Transparent top view 1Y3 1A3 2Y3 2A2 2Y2 1Y2 1A2 2A1 2Y1 1Y1 1A1 2A0 2Y0 1Y0 1A0 2OE 9 12 8 13 7 14 6 15 5 16 4 17 3 18 2 19 terminal 1 index area GND(1) Table 2. Pin description Symbol Pin Description 1OE, 2OE 1, 19 output enable input (active LOW) 1A0, 1A1, 1A2, 1A3 2, 4, 6, 8 data input 2Y0, 2Y1, 2Y2, 2Y3 3, 5, 7, 9 bus output GND 10 ground (0 V) 2A0, 2A1, 2A2, 2A3 17, 15, 13, 11 data input 1Y0, 1Y1, 1Y2, 1Y3 18, 16, 14, 12 bus output VCC 20 supply voltage |
类似零件编号 - 74HC244BQ |
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类似说明 - 74HC244BQ |
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