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3 / 16 page 74HC_HCT7540 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet Rev. 4 — 31 December 2012 3 of 16 NXP Semiconductors 74HC7540; 74HCT7540 Octal Schmitt trigger buffer/line driver; 3-state; inverting 5.2 Pin description 6. Functional description [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state. 7. Limiting values [1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. [2] For DIP20 packages: above 70 C the value of P tot derates linearly with 12 mW/K. For SO20 packages: above 70 C the value of P tot derates linearly with 8 mW/K. For SSOP20 packages: above 60 C the value of P tot derates linearly with 5.5 mW/K. Table 2. Pin description Symbol Pin Description OE1 1 output enable input (active LOW) A0 to A7 2, 3, 4, 5, 6, 7, 8, 9 data input GND 10 ground (0 V) Y0 to Y7 18, 17, 16, 15, 14, 13, 12, 11 data output OE2 19 output enable input (active LOW) VCC 20 supply voltage Table 3. Functional table[1] Control Input Output OE1 OE2 An Yn LL L H LL H L XH X Z HX X Z 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 [1] - 20 mA IOK output clamping current VO < 0.5 V or VO >VCC +0.5 V [1] - 20 mA IO output current 0.5 V < V O < VCC +0.5 V - 35 mA ICC supply current - 70 mA IGND ground current 70 - mA Tstg storage temperature 65 +150 C Ptot total power dissipation [2] DIP20 - 750 mW SO20, SSOP20 - 500 mW |
Số phần tương tự - 74HCT7540D |
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Mô tả tương tự - 74HCT7540D |
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