D Flip-Flop, 8-Func, Positive Edge Triggered, TTL, CDFP20,
| Parameter Name | Attribute value |
| Is it Rohs certified? | incompatible |
| Maker | Fairchild |
| Reach Compliance Code | compliant |
| JESD-30 code | R-XDFP-F20 |
| JESD-609 code | e0 |
| Logic integrated circuit type | D FLIP-FLOP |
| Number of functions | 8 |
| Number of terminals | 20 |
| Maximum operating temperature | 125 °C |
| Minimum operating temperature | -55 °C |
| Package body material | CERAMIC |
| encapsulated code | DFP |
| Encapsulate equivalent code | FL20,.3 |
| Package shape | RECTANGULAR |
| Package form | FLATPACK |
| power supply | 5 V |
| Certification status | Not Qualified |
| Nominal supply voltage (Vsup) | 5 V |
| surface mount | YES |
| technology | TTL |
| Temperature level | MILITARY |
| Terminal surface | Tin/Lead (Sn/Pb) |
| Terminal form | FLAT |
| Terminal pitch | 1.27 mm |
| Terminal location | DUAL |
| Trigger type | POSITIVE EDGE |
| Base Number Matches | 1 |

| 54LS273FM | 54LS273DM | 74LS273DC | 74LS273PC | 74LS273FC | |
|---|---|---|---|---|---|
| Description | D Flip-Flop, 8-Func, Positive Edge Triggered, TTL, CDFP20, | Parallel In Parallel Out, LS Series, 8-Bit, Right Direction, True Output, TTL, PDIP20, DIP-20 | D Flip-Flop, 8-Func, Positive Edge Triggered, TTL, CDIP20, | Parallel In Parallel Out, LS Series, 8-Bit, Right Direction, True Output, TTL, PDIP20, PLASTIC, DIP-20 | D Flip-Flop, 8-Func, Positive Edge Triggered, TTL, CDFP20, |
| Maker | Fairchild | Fairchild | Fairchild | Fairchild | Fairchild |
| Reach Compliance Code | compliant | unknown | compliant | unknown | compliant |
| JESD-30 code | R-XDFP-F20 | R-PDIP-T20 | R-XDIP-T20 | R-PDIP-T20 | R-XDFP-F20 |
| Logic integrated circuit type | D FLIP-FLOP | PARALLEL IN PARALLEL OUT | D FLIP-FLOP | PARALLEL IN PARALLEL OUT | D FLIP-FLOP |
| Number of functions | 8 | 1 | 8 | 1 | 8 |
| Number of terminals | 20 | 20 | 20 | 20 | 20 |
| Maximum operating temperature | 125 °C | 125 °C | 70 °C | 70 °C | 70 °C |
| Package body material | CERAMIC | PLASTIC/EPOXY | CERAMIC | PLASTIC/EPOXY | CERAMIC |
| encapsulated code | DFP | DIP | DIP | DIP | DFP |
| Encapsulate equivalent code | FL20,.3 | DIP20,.3 | DIP20,.3 | DIP20,.3 | FL20,.3 |
| Package shape | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR |
| Package form | FLATPACK | IN-LINE | IN-LINE | IN-LINE | FLATPACK |
| power supply | 5 V | 5 V | 5 V | 5 V | 5 V |
| Certification status | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified |
| Nominal supply voltage (Vsup) | 5 V | 5 V | 5 V | 5 V | 5 V |
| surface mount | YES | NO | NO | NO | YES |
| technology | TTL | TTL | TTL | TTL | TTL |
| Temperature level | MILITARY | MILITARY | COMMERCIAL | COMMERCIAL | COMMERCIAL |
| Terminal form | FLAT | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | FLAT |
| Terminal pitch | 1.27 mm | 2.54 mm | 2.54 mm | 2.54 mm | 1.27 mm |
| Terminal location | DUAL | DUAL | DUAL | DUAL | DUAL |
| Trigger type | POSITIVE EDGE | POSITIVE EDGE | POSITIVE EDGE | POSITIVE EDGE | POSITIVE EDGE |
| Is it Rohs certified? | incompatible | incompatible | incompatible | - | incompatible |
| JESD-609 code | e0 | e0 | e0 | - | e0 |
| Terminal surface | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | Tin/Lead (Sn/Pb) | - | Tin/Lead (Sn/Pb) |
| Base Number Matches | 1 | 1 | 1 | 1 | - |
| package instruction | - | DIP-20 | DIP, DIP20,.3 | DIP, DIP20,.3 | DFP, FL20,.3 |
| Peak Reflow Temperature (Celsius) | - | NOT SPECIFIED | NOT SPECIFIED | - | NOT SPECIFIED |
| Maximum time at peak reflow temperature | - | NOT SPECIFIED | NOT SPECIFIED | - | NOT SPECIFIED |