ALD7556PBL

Programmable Timers And Oscillators Overview

The ALD7556PBL is a dual CMOS analog RC timer from Advanced Linear Devices, housed in a 14-pin plastic DIP package. It operates within a supply voltage range of 2V to 10V and supports an operating temperature range of 0°C to +70°C. The device features two independent timers with rail-to-rail outputs compatible with CMOS, NMOS, and TTL logic. Key electrical characteristics include a typical supply current of 100µA, a maximum oscillation frequency of 2.5MHz at 5V, and a discharge sinking current of up to 80mA.

Programmable Timers And Oscillators Feature Summary

• Dual monolithic CMOS analog RC timing circuits with high input impedance
• Enhanced discharge output drive capable of sinking 80mA at 5V
• Low supply current consumption, typically 100µA for the dual configuration
• Direct pin-compatible replacement for NE555/NE556, SE555, TLC555, and ICM7555/ICM7556

Programmable Timers And Oscillators Applications

• Monostable one-shot pulse generation
• Astable free-running oscillator circuits
• Precision sequential timing and long delay timers
• Frequency division and synchronization

Programmable Timers And Oscillators Procurement Notes

Verify that the ordering suffix 'L' corresponds to lead-free (RoHS) compliance as defined by the manufacturer. Confirm the package type matches the 14-pin plastic DIP specification. Ensure the application environment remains within the specified 0°C to +70°C operating temperature range for this specific package variant.

Programmable Timers And Oscillators Selection Notes

Select the ALD7556PBL when two independent timer channels are required in a through-hole DIP package. This component is suitable for designs needing higher discharge current than standard CMOS timers or lower supply current than bipolar counterparts. Verify that the 2V to 10V supply voltage range meets the system power requirements.

Programmable Timers And Oscillators Part Context

The ALD7556PBL belongs to the ALD7555/ALD7556 family of single/dual CMOS analog RC timers. It serves as a functional equivalent to the industry-standard NE556 and ICM7556 devices but offers improved performance metrics including faster switching speeds, reduced leakage currents, and enhanced temperature stability.

Programmable Timers And Oscillators Replacement Considerations

The datasheet identifies the ALD7556PBL as a direct pin-out upgrade for NE556, SE555, TLC555, ICM7555, and ICM7556 devices. Designers should verify that the enhanced discharge current capability does not adversely affect existing load conditions.