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ID TECH Magbar™ Decoder Chip Set for Bar Codes and Magnetic Stripes

IDT Magbar Decoder Chip SetThe ID TECH MagBar Chip Set is a magnetic stripe and bar code decode chip set consisting of two main chips: the microcontroller chip and the multifunction chip. The chip set is far smaller than traditional chip sets. With a minimum of additional components, you can build a high performance and very feature rich bar code/magnetic stripe decoding subsystem. This high speed chip set has a minimum instruction time near 0.4 second minimum instruction time. The ID TECH MagBar Chip Set also uses parallel processing to offer a very quick and robust decode.

  • Size -- The standard ID TECH MagBar Chip Set package dimensions are 14.5 mm. by 13.5 mm. and 2 mm. thick (approximately 0.57" by 0.53" and 0.08") for the OKI microcontroller in a QFP package and 17.5 mm. by 17.5 mm. and 4.35 mm. thick (0.69" by 0.69" and .17" thick) for the WSI multifunction chip in a PLCC package. The basic bar code and magnetic stripe decode subsystem with support components is only about 38 mm. by 38 mm. (1.5" by 1.5") on a two layer board.
  • Magnetic Stripe Decoding -- The ID TECH MagBar Chip Set decodes single, dual and triple track magnetic stripes on credit cards and driver's licenses. The chip set supports driver's license formats accepted by the national motor vehicles standards group AAMVA and the California Department of Motor Vehicles. The encoded data can be in ANSI, ABA, IATA, or Thrift magnetic stripe format. There is an option for selecting the tracks to be read, sending or suppressing track 1 start/stop sentinels, sending the track two account number only, and an option for selecting the track separator character for multi-track readers.
  • Programmable Memory -- The ID TECH chip set uses a standard microcontroller with a programmable memory chip. This approach creates a two chip solution with rapid upgrade flexibility. Some vendors use a "Masked Microcontroller" approach, which requires at least a SRAM chip and a latch chip, therefore a three chip solution. Also, this approach requires long lead times for firmware revisions.


  • Beeper -- A good read beeper function may be added with the addition of the beeper, a diode, a transistor and a resistor.
  • LED -- A good read LED function may be added with the addition of the 3 mm. green LED, a transistor and a resistor.
  • Low Power Options -- There are lower power chip sets available. 
  • Non-Volatile Memory -- An AT93C56 EEPROM may be added for non-volatile memory to store variable configuration data. The SO-8 package is recommended.
  • Package Options -- The microcontroller chip is also available in either a 44 pin PLCC package or a 40 pin DIP package. The multifunction chip is also available in a 44 pin QFP package.
Microcontroller magnetic magnetic magnetic OKI MSM65X512A-GSK
Multifunction Chip WSI PSD312-12J (64 KB, 2 KB SRAM)
Input Devices (2 ports) Undecoded Laser Scanner (port 1)
Undecoded CCD Scanner (port 1)
Wand (port 1)
Slot Reader (port 1)
1, 2 or 3 track Mag. Stripe Reader (port 2); also supports AAMVA and California DMV
Output Interfaces TTL Serial (RS232C w. RS232 chip) supports baud rates from 300 to 19200
Keyboard Wedge; supports major PC keyboard interfaces
Wand Emulation; for systems that only accept wand input
Microcontroller Package QFP-44, surface mount only
Multifunction Package PLCC-44, surface mount or through hole
Maximum Scan Rates Laser Scanner: up to 150 scans per second; CCD Scanner: up to 200 reads per second; Wand: 3 to 100 in/sec on 10 mil. code
Good Read Signal Yes
Trigger Line Yes
Symbologies Code 39, Interleaved 2 of 5, Industrial 2 of 5, Code 128, Codabar, MSI/Plessy, Code 93, Code 11, UPC-A, -E and EAN-13, -8.
Supply Voltage +5 VDC
Chip Set Current Draw Typical 35 ma
Environmental Operating Temperature: 32 F to 155 F, 0 C to 70 C
Storage Temperature: -85 F to 302 F, -65 C to 150 C
User Programmable Features Enable/Disable individual symbologies
Enable/Disable, Send/Suppress check digit
Send/Suppress, Start/Stop character
Minimum/Maximum code length
Send/Suppress UPC number system digit
Send/Suppress EAN country code digits
Enable/Disable UPC/EAN separator/ supplemental
User selectable Code ID
Verification before good read
Adjust beep volume
Language select
Message Formatting: Selectable terminator character, Selectable 16 character preamble, Selectable 16 character postamble, Enable/Disable use of function codes
Data Editing: Validation of the input data, Rearrange the data, Insert/Delete character strings, Duplicate fields of data, Insert time delay between fields
RS232 Options: Baud rate, data bits, stop bits, parity, flow control
Keyboard Wedge Options: Terminal selection: AT, PS/2, Mac, etc.; Intercharacter delay, interblock delay
Wand Emulation Options: Scan rate, emulation mode, polatiry, W/N ratio


Additional Components for the Basic Decode Subsystem

Quantity Item Recommended Package
1 magnetic magnetic magnetic 11.0592 MHz Crystal HC-49S recommended
1 3.3 f/10V Tantalum Capacitor Case B recommended
1 47 f/10V Electrolytic Capacitor  
2 0.047 f Capacitor 1206 recommended
2 33 pf Capacitor 0805 recommended
10 4.7 K Resistor 0805 recommended

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