| Device | Long. Balance | Supply Voltage | Loop Current Limit | Ring Relay Drivers | Package Type | Temp Range | MSRP ($/1K Units) |
| HC5503T | 53 dB | -24, +5 | 30 mA | SOIC24 | 0 to 70 | $2.20 | |
| HC5504B | 58 dB | -48, +5 | 40 mA | 1 | SOIC24 | 0 to 70 | $4.55 |
| HC5503 | 53 dB | -24, +5 | 25 mA | 1 | SOIC24 | 0 to 70 | $2.51 |
