Atmel offers a broad range of 8051 architecture microcontrollers, with on-chip Flash program memory. Product line includes industry-standard socket drop-in devices, small footprint 20-pin devices, and In-System Programmable (ISP) parts. All devices are available in both commercial and industrial grades, for both 5V and low-voltage (2.7V — 6.0V) operation.

For applications not requiring fully reprogrammable devices, Atmel offers cost-effective single-chip alternatives to ROM devices via our AT80F5x and AT87F5x series of QuickFlash^TM based microcontrollers. For the price versions of a ROM-based microcontroller, you get one-time programmable (OTP) versions of our Flash-based products with no ROM manufacturing cycle time and near off-the-shelf lead times!