| 4413 | U3741BM-M3FL | UHF ASK/FSK Receiver |
| 4414 | U3741BM-M3FLG3 | UHF ASK/FSK Receiver |
| 4415 | U3750BM | One Chip Telephone Circuit |
| 4416 | U3760MB | Low-Voltage Standard Telephone Circuit |
| 4417 | U3760MB-MFN | Low-Voltage Standard Telephone Circuit |
| 4418 | U3760MB-MFNG3 | Low-Voltage Standard Telephone Circuit |
| 4419 | U3760MB-MSD | Low-Voltage Standard Telephone Circuit |
| 4420 | U3761MB | Low Voltage Standard Telephone Circuit with 13 Memories |
| 4421 | U3761MB-AFN | Low Voltage Standard Telephone Circuit with 13 Memories |
| 4422 | U3761MB-AFNG3 | Low Voltage Standard Telephone Circuit with 13 Memories |
| 4423 | U3761MB-ASD | Low Voltage Standard Telephone Circuit with 13 Memories |
| 4424 | U3761MBS | Universal Telephone IC |
| 4425 | U3762MB | Universal Telephone IC - All Functions Integrated |
| 4426 | U3770M | CT2 I/Q Modulator and Clock Circuitry |
| 4427 | U3800BM | Multi Standard Feature Phone Integrated Circuit |
| 4428 | U3810BM | Multi-Standard Feature Phone IC |
| 4429 | U3900BM | Programmable Telephone Audio Processor |
| 4430 | U3900BM-AFN | Programmable Telephone Audio Processor |
| 4431 | U3900BM-AFNG3 | Programmable Telephone Audio Processor |
| 4432 | U4030B | Telephone Speech Circuit |
| 4433 | U4037B | Low Voltage Speech Circuit with Tone Ringer Interface |
| 4434 | U4050B | Speech Circuit with Line-Powered Loudspeaker Amplifier |
| 4435 | U4055B | Low-Voltage Electronic Speech Circuit with Dialer Interface |
| 4436 | U4055B1 | Low-Voltage Electronic Speech Circuit with Dialer Interface |
| 4437 | U4056B1 | Low-voltage Electronic Speech circuit with Dialer Interface |
| 4438 | U4065B | FM Receiver |
| 4439 | U4065B-AFL | FM Receiver |
| 4440 | U4065B-AFLG3 | FM Receiver |
| 4441 | U4070B-FP | Tone Ringer Interface |
| 4442 | U4072B | Two-Tone Ringer for Telephone Sets |
| 4443 | U4074B | Tone Ringer Interface |
| 4444 | U4076B | Three-Tone Ringer for Telephone Sets |
| 4445 | U4076B-FL | Three-Tone Ringer for Telephone Sets |
| 4446 | U4078B | Tone Ringer Interface with DC/DC Converter |
| 4447 | U4080B | Voice-Switched Circuit for Handsfree Operation |
| 4448 | U4082B | Low-Voltage Voice-Switched IC for Hands-Free Operation |
| 4449 | U4083 | Low-Power Audio Amplifier for Telephone Applications |
| 4450 | U4083B | Low-Power Audio Amplifier for Telephone Applications |
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