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74HC138DB Arkusz danych(PDF) 4 Page - NXP Semiconductors |
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74HC138DB Arkusz danych(HTML) 4 Page - NXP Semiconductors |
4 / 19 page 74HC_HCT138 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet Rev. 4 — 27 June 2012 4 of 19 NXP Semiconductors 74HC138; 74HCT138 3-to-8 line decoder/demultiplexer; inverting 5.2 Pin description 6. Functional description [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care. 7. Limiting values Table 2. Pin description Symbol Pin Description A0, A1, A2 1, 2, 3 address input A0, A1, A2 E1, E2 4, 5 enable input E1, E2 (active LOW) E3 6 enable input E3 (active HIGH) Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7 15, 14, 13, 12, 11, 10, 9, 7 output Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7 (active LOW) GND 8 ground (0 V) VCC 16 positive supply voltage Table 3. Function table[1] Control Input Output E1 E2 E3 A2 A1 A0 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 H XXXX XH H H H H H H H XH X XX L L L H L L L HH HH HH HL L L H H HH HH HL H LH LH H H H H L H H L H H H HH HL HH H H L L H HH L H HH H H L H H HL HH HH H H H L H L H HH HH H H H H L HH HH HH H Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit VCC supply voltage −0.5 +7 V IIK input clamping current VI < −0.5 V or VI >VCC +0.5 V - ±20 mA IOK output clamping current VO < −0.5 V or VO >VCC +0.5 V - ±20 mA IO output current VO = −0.5 V to (VCC +0.5 V) - ±25 mA ICC quiescent supply current - 50 mA IGND ground current - −50 mA Tstg storage temperature −65 +150 °C |
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