This listing is for a test socket allowing reversible insertion of a TQFP44 SMD chip into a breadboard or perfboard with 0.1” (2.54 mm) hole spacing for programming or prototyping. The pins on the bottom of the adapter are in a wide DIP (0.6”) arrangement. It’s analogous to a zero insertion force (ZIF) socket for DIP chips but for an SMD part. The rows of pins on the bottom of the adapter fit into the ZIF socket of many chip programmers, allowing the programming of compatible chips but it can also be inserted into a solderless breadboard or soldered into a prototyping perfboard.
There is an ISP interface header broken out to one edge of the adapter for easy programming of compatible ATmega chips (ATmega8535, ATmega16, ATmega16A, ATmega32, ATmega32A, ATmega164, ATmega324P, ATmega644P, ATmega1284P series).
The second image shows the pin-out of the adapter when the chip is inserted as indicated with pin one at the top left. Be aware that there is nothing to stop you from inserting the chip in a different orientation in which case the pin-out will not be as indicated and the ISP interface header will not work. Care must be taken to insert the chip in the correct orientation.
Note that QFP chip pins 17, 18, 38 and 39 are not broken-out to
DIP pins – these correspond to redundant VCC and GND pins in
compatible ATmega chips. This allows the adapter to be used in programmers with 40-pin ZIF sockets.
To operate the socket, lift open the lid by the front tab and place or remove the TQFP44 chip. Fully close the lid with a chip in place to engage the chip’s leads with the electrical contacts of the socket.
The perfboard and breadboard in the pictures are to demonstrate the pin spacing and are not included in the sale.
Delivery
Orders will be dispatched within one business day, using recycled packaging wherever viable.
By default, all orders are dispatched by Royal Mail Second Class/RM48. If your order is needed urgently, you are encouraged to select an upgraded postage option, such as First Class/RM24 or Royal Mail Special Delivery, during checkout.
Some areas of the UK have experienced a degraded level of service from the Royal Mail with deliveries as infrequently as once per week or worse. If you are currently affected by this, please contact me before ordering to discuss the possibility of using an alternative courier service.