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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  E4991A | RF Impedance/Material Analyzer | Agilent(Hewlett-Packard) | HP | - | - | - | 1.07 Mb |
| 2. | UPD4991A | 4-BIT PARALLEL I/O CALENDAR CLOCK | NEC | NEC | - | - | - | 143 Kb |
| 3. | XRK4991A | 3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER | Exar Corporation | EXAR | - | - | - | 252 Kb |
| 4. | 051-124-984991A | Cannon 75 Ohm Connectors | ITT Industries | ITT | - | - | - | 232 Kb |
| 5. | 051-128-924991A | Cannon 75 Ohm Connectors | ITT Industries | ITT | - | - | - | 232 Kb |
| 6. | W51-124-944991A | Cannon 75 Ohm Connectors | ITT Industries | ITT | - | - | - | 232 Kb |
| 7. | E4991A-001 | RF Impedance/Material Analyzer | Agilent(Hewlett-Packard) | HP | - | - | - | 1.07 Mb |
| 8. | E4991A-002 | RF Impedance/Material Analyzer | Agilent(Hewlett-Packard) | HP | - | - | - | 1.07 Mb |
| 9. | E4991A-007 | RF Impedance/Material Analyzer | Agilent(Hewlett-Packard) | HP | - | - | - | 1.07 Mb |
| 10. | E4991A-010 | RF Impedance/Material Analyzer | Agilent(Hewlett-Packard) | HP | - | - | - | 1.07 Mb |
| 11. | E4991A-1D5 | RF Impedance/Material Analyzer | Agilent(Hewlett-Packard) | HP | - | - | - | 1.07 Mb |
| 12. | XRK4991ACJ-5 | 3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER | Exar Corporation | EXAR | - | - | - | 252 Kb |
| 13. | XRK4991ACJ-7 | 3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER | Exar Corporation | EXAR | - | - | - | 252 Kb |
| 14. | UPD4991ACX | 4-BIT PARALLEL I/O CALENDAR CLOCK | NEC | NEC | - | - | - | 143 Kb |
| 15. | UPD4991AGS | 4-BIT PARALLEL I/O CALENDAR CLOCK | NEC | NEC | - | - | - | 143 Kb |
| 16. | XRK4991AIJ-5 | 3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER | Exar Corporation | EXAR | - | - | - | 252 Kb |
| 17. | XRK4991AIJ-7 | 3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER | Exar Corporation | EXAR | - | - | - | 252 Kb |
| 18. | ORNA4991AT0 | Molded, 50 Mil Pitch, Dual-In-Line Resistor Network | Vishay Siliconix | VISHAY | - | - | - | 373 Kb |
| 19. | ORNTA4991AT0 | Molded, 50 Mil Pitch, Dual-In-Line Resistor Network | Vishay Siliconix | VISHAY | - | - | - | 373 Kb |
| 20. | ORNA4991AT1 | Molded, 50 Mil Pitch, Dual-In-Line Resistor Network | Vishay Siliconix | VISHAY | - | - | - | 373 Kb |
