| 1639281 | U6432B | Lamp load > 1 W, 18 mOhm shunt | Atmel |
| 1639282 | U6432B-FP | Low-power Flasher IC with 18-mOMShunt | Atmel |
| 1639283 | U6433B | Lamp load > 1 W, 18 mOhm shunt | Atmel |
| 1639284 | U6433B | Flasher/ 18-m Shunt/ Frequency Doubling Disabling | TEMIC |
| 1639285 | U6433B-FP | Flasher, 18-mOhm shunt, frequency doubling disabling. | Atmel |
| 1639286 | U6433B-FP | Flasher/ 18-m Shunt/ Frequency Doubling Disabling | TEMIC |
| 1639287 | U643B | Lamp load > 1 W, 30 mOhm shunt | Atmel |
| 1639288 | U643B-FP | Flasher/ 30-mohm Shunt | Atmel |
| 1639289 | U644B | Flasher/ 18-m Shunt/ Extremly Low Current Consumption | TEMIC |
| 1639290 | U644B-FP | Flasher/ 18-m Shunt/ Extremly Low Current Consumption | TEMIC |
| 1639291 | U6516D | Static (2k x 8) bit RAM, possibly equivalent I6516 | RFT |
| 1639292 | U666B | GHz prescaler (factor = 256) | etc |
| 1639293 | U666BS | GHz prescaler (factor = 256) | etc |
| 1639294 | U6803B | Triple driver 3 x 25 mA output with thermal monitoring | Atmel |
| 1639295 | U6803B | Triple-Driver with Thermal Monitoring | TEMIC |
| 1639296 | U6803B-FP | Triple-Driver with Thermal Monitoring | TEMIC |
| 1639297 | U6803B-MFP | Triple-Driver IC with Thermal Monitoring | Atmel |
| 1639298 | U6803B-MFPG3 | Triple-Driver IC with Thermal Monitoring | Atmel |
| 1639299 | U6805B | Hex driver 6 x 25 mA with thermal monitoring | Atmel |
|
| 1639300 | U6805B | Hex-Driver with Thermal Monitoring | TEMIC |
| 1639301 | U6805B-FP | Hex driver IC with thermal monitoring. | Atmel |
| 1639302 | U6805B-FP | Hex-Driver with Thermal Monitoring | TEMIC |
| 1639303 | U6808B | Fail-Safe IC | Atmel |
| 1639304 | U6809B | Fail-Safe IC | Atmel |
| 1639305 | U6812B | Single-ended bus transceiver (ISO 9141) with triple buffer | Atmel |
| 1639306 | U6813B | Fail-Safe IC | Atmel |
| 1639307 | U6813B-MFPG3 | Fail-safe IC with High-side and Relay Driver | Atmel |
| 1639308 | U6815BM | Dual Hexdriver with serial input control | Atmel |
| 1639309 | U6815BM-NFL | Dual Hex DMOS Output Driver with Serial input Control | Atmel |
| 1639310 | U6815BM-NFLG3 | Dual Hex DMOS Output Driver with Serial input Control | Atmel |
| 1639311 | U6820BM | Dual quad driver IC | Atmel |
| 1639312 | U6820BM-FP | Dual Quad BCDMOS Driver IC | Atmel |
| 1639313 | U68B | 68 Pin Ceramic Pin Grid Array, Cavity Up | National Semiconductor |
| 1639314 | U68C | 68 Pin Ceramic Pin Grid Array | National Semiconductor |
| 1639315 | U68D | 68 Pin Ceramic Pin Grid Array | National Semiconductor |
| 1639316 | U68E | 68 Pin Ceramic Pin Grid Array, Cavity Up | National Semiconductor |
| 1639317 | U690B | Rear Wiper Interval/Wipe-Wash Control | TEMIC |
| 1639318 | U6KBA80R | General Purpose Rectifiers / SIP Bridges | Shindengen |
| 1639319 | U6SB20 | General Purpose Rectifiers(200V 6A) | Shindengen |
| 1639320 | U6SB60 | General Purpose Rectifiers(600V 6A) | Shindengen |
