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| Part Number | PCF7991AT/1081/M,1 | PCF7991AT/1081/M:1 | PCF7991AT/1081,112 | PCF7991AT/1081,118 |
| Manufacturer | NXP USA Inc. | NXP USA Inc. | NXP USA Inc. | NXP USA Inc. |
| Series | - | - | - | - |
| Package/Case | 14-SOIC (0.154", 3.90mm Width) | - | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
| Packaging | Tape & Reel (TR) | Tube | Tube | Tape & Reel (TR) |
| Product Status | Active | Obsolete | Obsolete | Active |
| Type | RFID Transponder | - | RFID Transponder | RFID Transponder |
| Frequency | 4MHz ~ 16MHz | - | 4MHz ~ 16MHz | 4MHz ~ 16MHz |
| Standards | - | - | - | - |
| Interface | - | - | - | - |
| Voltage - Supply | 4.5V ~ 5.5V | - | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | - | -40°C ~ 85°C | -40°C ~ 85°C |
| Grade | - | - | - | - |
| Qualification | - | - | - | - |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Supplier Device Package | 14-SO | - | 14-SO | 14-SO |
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