Product Summary
The AT89S52-24AU is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmels high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. The AT89S52-24AU provides the following standard features: 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89S52-24AU is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes.
Parametrics
AT89S52-24AU absolute maximum ratings: (1)Operating Temperature: -55℃ to +125℃; (2)Storage Temperature: -65℃ to +150℃; (3)Voltage on Any Pin with Respect to Ground: -1.0V to +7.0V; (4)Maximum Operating Voltage: 6.6V; (5)DC Output Current: 15.0 mA. 
Features
AT89S52-24AU features: (1)Compatible with MCS51 Products; (2)8K Bytes of In-System Programmable (ISP) Flash Memory: Endurance: 10,000 Write/Erase Cycles; (3)4.0V to 5.5V Operating Range; (4)Fully Static Operation: 0 Hz to 33 MHz; (5)Three-level Program Memory Lock; (6)256 x 8-bit Internal RAM; (7)32 Programmable I/O Lines; (8)Three 16-bit Timer/Counters; (9)Eight Interrupt Sources; (10)Full Duplex UART Serial Channel; (11)Low-power Idle and Power-down Modes; (12)Interrupt Recovery from Power-down Mode; (13)Watchdog Timer; (14)Dual Data Pointer; (15)Power-off Flag; (16)Fast Programming Time; (17)Flexible ISP Programming (Byte and Page Mode); (18)Green (Pb/Halide-free) Packaging Option.
Diagrams

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                            ![]() AT89S52-24AU  | 
                            ![]() Atmel  | 
                            ![]() 8-bit Microcontrollers (MCU) 8kB Flash 256B RAM 33MHz 4.0V-5.5V  | 
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                            ![]() AT8934  | 
                            ![]() TE Connectivity  | 
                            ![]() General Purpose / Industrial Relays SEALED R RELAY  | 
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                            ![]() AT8985P  | 
                            ![]() Other  | 
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                            ![]() AT8989UP  | 
                            ![]() Other  | 
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                            ![]() Negotiable  | 
                            
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                            ![]() AT8992-A2-T-1  | 
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                            ![]() IC SWITCH PHY 64-TQFP  | 
                            ![]() Data Sheet  | 
                            ![]() Negotiable  | 
                            
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                            ![]() AT8992M-A2-T-1  | 
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                            ![]() IC SWITCH PHY 100-MQFP  | 
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                            ![]() Negotiable  | 
                            
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![]()  | 
                            ![]() AT8993-A2-T-1  | 
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                            ![]() IC SWITCH PHY 100-MQFP  | 
                            ![]() Data Sheet  | 
                            ![]() Negotiable  | 
                            
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 (China (Mainland)) 
                         
                        
                                    








