The A6276 is a 16-bit serial-input constant-current latched LED driver specifically designed for LED display applications. It includes a 16-bit CMOS shift register, accompanying data latches, and 16 npn constant-current sink drivers. The device can be directly interfaced with microprocessor-based systems using the CMOS shift register and latches. The LED drive current is determined by the user's selection of a single resistor. Cascade connections are possible using the CMOS serial data output for applications requiring additional drive lines. All output drivers can be disabled for inter-digit blanking by setting the ENABLE input high. Similar 8-bit devices, the A6275EA and A6275ELW, are also available. The A6276 is offered in three package styles: through-hole DIP, surface-mount SOIC, and TSSOP with exposed thermal pad. The DIP package can continuously sink the maximum rated current through all outputs over the operating temperature range. The three packages are electrically identical and share a common terminal number assignment.
The A6276 LED driver integrates a 16‑bit CMOS shift register, data latches and sixteen constant‑current sink drivers, making it suitable for LED‑display applications. It operates from a 5 V supply, supports serial data rates up to 20 MHz, and provides under‑voltage lockout protection.
The device is offered in three package styles (24‑pin DIP, SOIC and TSSOP) and includes detailed electrical, switching and timing specifications such as a supply voltage range of 4.5‑5.5 V, continuous output current of 90 mA per channel, and a maximum clock frequency of 10 MHz. Temperature operation spans –40 °C to +85 °C.
| Output Current (continuous per channel) | 90 mA |
|---|---|
| Under‑Voltage Lockout (UVLO) | 3.4 V – 4.0 V |
| Package Styles | 24‑pin DIP, 24‑pin SOIC, 24‑pin TSSOP |
| Propagation Delay (typical) | 350 ns – 1000 ns |
Each output can continuously source up to 90 mA.
The part is offered in 24‑pin DIP, 24‑pin SOIC and 24‑pin TSSOP packages.