AT89C5121-YSUL representative package visual — not an exact-product photograph

Representative package visual — not an exact-product photographProduct referenceVendor-delivered DigiKey product/package image

Exact MPN19 sourced attributes2 source documents

Microchip Technology · exact orderable part

AT89C5121-YSUL

IC MCU 8BIT 16KB FLSH RAM 24SSOP

Core Processor: 80C51
Speed: 16MHz
Program Memory Size: 16KB (16K x 8)
RAM Size: 256 x 8
Voltage - Supply (Vcc/Vdd): 2.85V ~ 5.4V
Package / Case: 24-SSOP (0.209", 5.30mm Width)

Original manufacturerCommercial terms confirmed per lot

ManufacturerMicrochip Technology

Package / case24-SSOP (0.209", 5.30mm Width)

Mounting typeSurface Mount

PackingTube

Technical parameters

Technical specifications

19 normalized values · 2 validated sources

Report a data issue

AT89C5121-YSUL technical parameters
Parameter	Value
Base Product Number	AT89C5121 [2]
Connectivity	SmartCard, UART/USART [2]
Core Processor	80C51 [2]
Core Size	8-Bit [2]
EEPROM Size	16K x 8 [2]
Mfr	Microchip Technology [2]
Mounting Type	Surface Mount [2]
Number of I/O	14 [2]
Operating Temperature	-40°C~85°C(TA) [2]
Oscillator Type	Internal [2]
Peripherals	LED, POR, WDT [2]
Product Status	Obsolete [2]
Program Memory Size	16KB (16K x 8) [2]
Program Memory Type	Flash RAM [2]
RAM Size	256 x 8 [2]
Series	89C [2]
Speed	16MHz [2]
Voltage - Supply (Vcc/Vdd)	2.85V ~ 5.4V [2]
Package / Case	24-SSOP (0.209", 5.30mm Width) [2]

Specification references[1]AT89C5121-YSUL delivered document ↗[2]Microchip Technology AT89C5121-YSUL vendor product record ↗

Catalog relationships

Keep family and exact MPN intent separate.

This page describes one orderable part. A family page helps select suffixes but never carries assumed stock or a price.

ManufacturerMicrochip TechnologyView brand page →CategoryMicrocontrollersView category page →

Related exact parts

Other published parts

Browse exact MPNs and compare their specifications. These links do not imply compatibility or interchangeability.