The MFC-8640D is the ideal solution for your home office or small-to-medium size business since it offers high-quality laser printing, full set of fax features, color scanning and stand-alone copying and faxing too! Its flatbed design with legal size document glass and an up to 50-page auto document feeder is convenient for quick copying and scanning. If that's not enough, the MFC-8640D also offers automatic duplexing for 2-sided printing, copy output and fax receiving.
† System Requirements
Download System Requirements 
Ask the Product Manager
- Presales assistance
- Help selecting the right model
- Replacement for my current model
Connectivity & Compatibility
- Optional Interface(s)
- NC-9100H (internal ethernet option)
- Standard Interface(s)
- Parallel & USB Interfaces
Copy
- Black Copy Speed (max. cpm)
- 21cpm Black
- Copying Capability
- B/W Copying
- Design Style
- B/W Laser Technology
- Document Glass Size
- Legal-size
- N in 1 Function
- 2 in 1 / 4 in 1
- Poster Function
- Yes
- Reduction/Enlargement
- 25% - 400%
- Sorting Function
- Yes
- Stand-alone Copying
- No PC Required
Dimensions & Weights
- Carton Dimensions (W"xD"xH")
- 22.3" x 24.7" x 22.6"
- Carton Weight (lbs)
- 51.3 lbs.
- Unit Dimensions (W"xD"xH")
- 20.9" x 17.5" x 18.5"
- Unit Weight (lbs)
- 39.9 lbs.
Fax
- Best Transmission Speed (approx. sec./page)‡
- Approx. 2 seconds per page
- Broadcasting (# of locations)
- Yes (290 Locations)
- Call Waiting/ Caller ID/ Distinctive Ring Ready‡
- Yes
- Caller ID Ready‡
- Yes
- Distinctive Ring Detection Ready‡
- Yes
- Document Memory Backup
- Yes
- External TAD Interface
- Yes
- Fax Modem Speed
- 33.6K bps Super G3 Fax Modem
- Fax Page Memory (max. pages)‡
- Up to 400 page fax memory
- Faxing Capability
- B/W Faxing
- Fax/Telephone Switch
- Yes
- Out-of-Paper Reception
- Yes
- PC Fax Capability (send/receive)†
- Yes
- Quick Scan/Memory Transmission (approx. sec/page)‡
- Approx. 2 sec/page
- Total Auto Dial Locations
- 240 locations
General
- LCD Size (characters/lines)
- 22 characters/5 lines
- Maximum Monthly Duty Cycle‡
- 20,000 printed pages
- Optional Memory (MB)
- Yes‡
- Standard Memory
- 16MB Memory
- Toner Save Mode
- Yes
Paper Handling
- Automatic Document Feeder Capacity (max. pages)‡
- 50-Page ADF
- Duplex Printing Capability
- Yes
- Manual Feed/Multi-purpose Tray Capacity
- Yes (up to 50 sheets)
- Maximum Input of ADF (Width/Height)
- 8.5"/14"
- Maximum Paper Width/Length (Paper Tray)
- 8.5"/14.0"
- Minimum Input for ADF (Width/Height)
- 5.8"/5"
- Minimum Paper Width/Length (Paper Tray)
- 5.8"/5"
- Optional Paper Trays (capacity)
- LT-5000 (250 sheets)
- Output Paper Capacity (sheets)
- 150 sheets
- Paper Handling Size - Paper Tray
- LT5000 (optional 2nd 250-sheet adjustable paper tray)
- Sheet Weight - ADF (min/max)
- 17 - 24 lbs.
What’s Included
- "In-box" Consumables/Yield‡
- (1) TN540 Standard Yield Toner Cartridge (3,500 Pages)(1) DR510 Drum Unit (20,000 Pages)
- Warranty
- 1 Year Limited
| Automatic Document Feeder Capacity (max. pages)‡ | Maximum capacity based on using 20 lb (bond) paper. |
| Best Transmission Speed (sec)‡ | Based on Brother #1 Chart with highest available coding method and standard resolution. |
| Distinctive Ring Detection Ready‡ | Check with local phone company for service availability. |
| Fax Page Memory‡ | Based on Brother #1 Chart at standard resolution with MMR compression |
| "In-Box" Consumables (Yield)‡ | Approx. ink yield based on letter paper size at 5% page coverage. Yields may vary with conditions and use. |
| Maximum Monthly Duty Cycle‡ | Maximum number of printed pages per month and can be used to compare designed durability between like Brother products. For maximum printer life, it is best to choose a printer with a duty cycle that far exceeds your print requirements. |
| Optional Paper Trays (capacity) | Maximum capacity based on using 20 lb. (bond) paper. Additional purchase required. |
| Quick Scan (Memory Transmission)‡ | Using Brother #1 Chart at standard resolution and highest compression mode. |
| Standard Interface(s)‡ | Cable(s) not included. |
- If free shipping is indicated above: free ground shipping on orders over $49.99 within the contiguous U.S. See Shipping Policy for details and conditions.
*Prices May Vary
Contact Support
In order to best assist you, please use one of the channels below to contact the Brother support team.
Available Monday - Friday, 9:00am to 9:00pm Eastern Time
Best for help with:
• Basic machine operation and specification questions
• Order status/tracking information
• Product/service feedback
Call Support
1.877.BROTHER(877.276.8437)
Available Monday - Friday, 9:00am to 9:00pm Eastern Time
Best for help with:
• Wireless installation and troubleshooting
• Software and drivers
• Printing, copying, scanning, faxing issues and errors
Best for quick help with:
• Questions regarding basic machine operations and specifications
• Fax setup and operation
• Order status/Tracking information