STMicroelectronics EF68B21P Peripheral Interface Adapter (18 pcs)
Regular price
€207,36
inc. VAT
STMicroelectronics EF68B21P Peripheral Interface Adapter (PIA) — 8-bit Parallel I/O, Dual 8-bit Bidirectional I/O Ports, 2 MHz, DIP-40, 6800-family compatible, 18 pieces per tube. Classic 6821-family PIA providing two fully programmable 8-bit bidirectional I/O ports (Port A and Port B), each with its own data direction register and control lines. Compatible with Motorola 6800/6809 bus architecture; each port has an associated interrupt request line and handshake control.
Available in stock — ships within 3 days after payment.
Product overview
| Part number | EF68B21P |
| Manufacturer | STMicroelectronics |
| Product type | Peripheral Interface Adapter (PIA) — parallel I/O controller IC |
| IC family | 6821 / MC6821 compatible |
| Bus compatibility | Motorola 6800/6809 family |
| I/O ports | 2× 8-bit bidirectional parallel I/O (Port A and Port B) |
| Data direction | Each bit individually programmable as input or output via Data Direction Register |
| Control lines | 2× per port (CA1/CA2, CB1/CB2) — interrupt and handshake |
| Interrupt outputs | 2× IRQ lines (IRQA, IRQB) |
| Max. clock frequency | 2 MHz (B-suffix variant) |
| Supply voltage | 5 V DC |
| Package | DIP-40 (through-hole) |
| RoHS compliance | Yes |
| Quantity per tube | 18 pieces |
| Condition | New in original packaging (OVP) |
Applications
- Parallel I/O expansion for 6800/6809-based embedded systems and retro computing platforms
- Legacy industrial control systems and instrumentation requiring 6821-compatible PIA interfaces
- Replacement and maintenance of existing equipment using Motorola 6821 or compatible PIAs
- Educational and hobbyist projects involving vintage 8-bit microprocessor architectures
Shipping
- Ships within 3 days after payment
- Secure packaging for safe delivery
- Free delivery within Germany
Warranty & compliance
- 12-month warranty included
- Product is fully compliant with EU industry standards
- VAT invoice included with every order
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