| Type No | No. of pins | ROM capacity | RAM capacity | Package | Features |
| LC66304A/306A/308A | 42 | 4 K/6 K/8 KB | 512 W | DIP42S QFP48E | |
| LC66404A/406A/408A | 42 | 4 K/6 K/8 KB | 512 W | DIP42S QFP48E | Normal versions |
| LC66506B/508B/512B/516B | 64 | 6 K/8 K/12 K/16 KB | 512 W | DIP64S QFP64A | 4.0 t0 6.0 V/0.92 ps |
| LC66354A/356A/358A | 42 | 4 K/6 K/8 KB | 512 W | DIP42S QFP48E | |
| LC66354S/356S/358S | 42 | 4 K/6 K/8 KB | 512 W | QFP44M | Low-voltage versions |
| LC66556A/558A/562A/566A | 64 | 6 K/8 K/12 K/16 KB | 512 W | DIP64S QFP64E | 2.2 t0 5.5 V/3.92 ps |
| LC66354B/356B/358B | 42 | 4 K/6 K/8 KB | 512 W | DIP42S QFP48E | Low-voltage high-speed versions |
| LC66556B/558B/562B/566B | 64 | 6 K/8 K/12 K/16 KB | 512 W | DIP64S QFP64E | 3.0 t0 5.5 V/0.92 ps |
| LC66354C/356C/358C | 42 | 4 K/6 K/8 KB | 512 W | DIP42S QFP48E | 2.5 t0 5.5 V/0.92 ps |
| LC662104A/06A/08A | 30 | 4 K/6 K/8 KB | 384 W | DIP30SD MFP30S | |
| LC662304A/06A/08A/12A/16A | 42 | 4 K/6 K/8 K/12 K/16 KB | 512 W | DIP42S QFP48E | On-chip DTMF generator versions 3.0 t0 5.5 V/0.95 ps |
| LC662508A/12A/16A | 64 | 8 K/12 K/16 KB | 512 W | DIP64S QFP64E |
| LC665304A/06A/08A/12A/16A | 48 | 4 K/6 K/8 K/12 K/16 KB | 512 W | DIP48S QFP48E | Dual oscillator support 3.0 t0 5.5 V/0.95 ps |
| LC66E308 | 42 | EPROM 8 KB | 512 W | DIC42S QFC48 with window with window | |
| LC66P308 | 42 | OTPROM 8 KB | 512 W | DIP42S QFP48E |
| LC66E408 | 42 | EPROM 8 KB | 512 W | DIC42S QFC48 with window with window | Window and OTP evaluation versions |
| LC66P408 | 42 | OTPROM 8 KB | 512 W | DIP42S QFP48E | 4.5 t0 5.5 V/0.92 ps |
| LC66E516 | 64 | EPROM 16 KB | 512 W | DIC64S QFC64 with window with window |
| LC66P516 | 64 | OTPROM 16 KB | 512 W | DIP64S QFP64E |
| LC66E2108 | 30 | EPROM 8 KB | 384 W | | |
| LC66E2316 | 42 | EPROM 16 KB | 512 W | DIC42S QFC48 with window with window | Window evaluation versions |
| LC66E2516 | 64 | EPROM 16 KB | 512 W | DIC64S QFC64 with window with window | 4.5 t0 5.5 V/0.92 ps |
| LC66E5316 | 52/48 | EPROM 16 KB | 512 W | DIC52S QFC48 with window with window |
| LC66P2108 | 30 | OTPROM 8 KB | 384 W | DIP30SD MFP30S | |
| LC66P2316 | 42 | OTPROM 16 KB | 512 W | DIP42S QFP48E | OTP |
| LC66P2516 | 64 | OTPROM 16 KB | 512 W | DIP64S QFP64E | 4.0 t0 5.5 W0.95 ps |
| LC66P5316 | 48 | OTPROM 16 KB | 512 W | DIP48S QFP48E |
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