Datasheet ATmega16M1, ATmega32M1, ATmega64M1 - Summary (Atmel) - 9

2. Ordering Information 2.1. ATmega16M1 Speed [MHz] Power Supply [V] Ordering Code Package Operational Range
16 2.7 - 5.5 ATmega16M1-AU 32A Industrial ATmega16M1-MU PV (-40°C to 85°C)
Note: 
All packages are Pb free, fully LHF.
Package Type
32A 32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP) PV PV, 32-lead, 7.0mm × 7.0mm body, 0.65mm pitch quad flat no lead package (QFN)
2.2. ATmega32M1 Speed [MHz] Power Supply [V] Ordering Code Package Operational Range
16 2.7 - 5.5 ATmega32M1-AU 32A Industrial ATmega32M1-MU PV (-40°C to 85°C)
Note: 
All packages are Pb free, fully LHF.
Package Type
32A 32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP) PV PV, 32-lead, 7.0mm × 7.0mm body, 0.65mm pitch quad flat no lead package (QFN)
2.3. ATmega64M1 Speed [MHz] Power Supply [V] Ordering Code Package Operational Range
16 2.7 - 5.5 ATmega64M1-AU 32A Industrial ATmega64M1-MU PV (-40°C to 85°C)
Note: 
All packages are Pb free, fully LHF.
Package Type
32A 32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP) PV PV, 32-lead, 7.0mm × 7.0mm body, 0.65mm pitch quad flat no lead package (QFN) Atmel ATmega16M1/32M1/64M1 [DATASHEET] 9 Atmel-8209F-ATmega16M1/32M1/64M1_Datasheet_Summary-10/2016 Document Outline Introduction Features Table of Contents 1. Pin configurations 1.1. Pin descriptions 2. Ordering Information 2.1. ATmega16M1 2.2. ATmega32M1 2.3. ATmega64M1 3. Overview 3.1. Block diagram 3.2. Pin descriptions 3.2.1. VCC 3.2.2. GND 3.2.3. Port B (PB7..PB0) 3.2.4. Port C (PC7..PC0) 3.2.5. Port D (PD7..PD0) 3.2.6. Port E (PE2..0) RESET/ XTAL1/XTAL2 3.2.7. AVCC 3.2.8. AREF 4. Resources 5. About code examples 6. Data retention 7. Packaging Information 7.1. 32-pin 32A 7.2. PV 32 QFN