JAJSMD1F December 1982 – June 2021 SN54HC74 , SN74HC74
PRODUCTION DATA
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THERMAL METRIC(1) | SN74HC74 | SN54HC74 | UNIT | |||||||
---|---|---|---|---|---|---|---|---|---|---|
D (SOIC) | DB (SSOP) | N (PDIP) | NS (SO) | PW (TSSOP) | J (CDIP) | W (CFP) | FK (LCCC) | |||
14 PINS | 14 PINS | 14 PINS | 14 PINS | 14 PINS | 14 PINS | 14 PINS | 20 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 133.6 | 107.7 | 61.9 | 122.6 | 151.7 | N/A | N/A | N/A | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 89.0 | 57.4 | 49.7 | 81.8 | 79.4 | 15.05 | 14.65 | 5.61 | °C/W |
RθJB | Junction-to-board thermal resistance | 89.5 | 57.9 | 41.7 | 83.8 | 94.7 | N/A | N/A | N/A | °C/W |
ΨJT | Junction-to-top characterization parameter | 45.5 | 17.6 | 29.3 | 45.4 | 25.2 | N/A | N/A | N/A | °C/W |
ΨJB | Junction-to-board characterization parameter | 89.1 | 57.2 | 41.4 | 83.4 | 94.1 | N/A | N/A | N/A | °C/W |
RθJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | °C/W |