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SN74F621N Fiches technique(PDF) 2 Page - Texas Instruments |
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SN74F621N Fiches technique(HTML) 2 Page - Texas Instruments |
2 / 14 page SN54F621, SN74F621 OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS SDFS004B – D2932, MARCH 1987 – REVISED OCTOBER 1993 2–2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 logic symbol† logic diagram (positive logic) 2 A1 B1 EN1 19 EN2 1 OEAB 2 A1 3 A2 B1 18 4 A3 5 A4 6 A5 7 A6 8 A7 9 A8 B2 17 B3 16 B5 14 B4 15 B6 13 B8 11 B7 12 OEBA 1 OEBA OEAB 19 1 18 2 To Seven Other Channels † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage range, VCC – 0.5 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range, VI (excluding I/O ports) (see Note 1) – 1.2 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input current range, IIK – 30 mA to 5 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage range applied to any output in the high state – 0.5 V to 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Current into any output in the low state: SN54F621 (A1 – A8) 40 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN54F621 (B1 – B8) 96 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74F621 (A1 – A8) 48 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74F621 (B1 – B8) 128 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range: SN54F621 – 55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74F621 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range – 65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: The input-voltage ratings may be exceeded provided the input-current ratings are observed. recommended operating conditions SN54F621 SN74F621 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VOH High-level output voltage 5.5 5.5 V VIL Low-level input voltage 0.8 0.8 V IIK Input clamp current –18 –18 mA IOL Low level output current A1 – A8 20 24 mA IOL Low-level output current B1 – B8 48 64 mA TA Operating free-air temperature –55 125 0 70 °C |
Numéro de pièce similaire - SN74F621N |
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Description similaire - SN74F621N |
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