Specifications
- YM256:
- 256 x 1 bits EPROM
- Prepaid phone card
- Security mechanism
- YM104:
- 104 x 1 bits EPROM
- Prepaid phone card
- Transport code protection for delivery
- YM221 (Euro Chip):
- 221 x 1 bits
- Advanced prepaid phone card
- Transport code protection for delivery
- YM221 has two authentication keys
Main Products
IC card related products that include payphone cards, memory cards, electronic purse cards, SIM cards of GSM and smart card related readers.