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PIC17C756A Datasheet(PDF) 9 Page - Microchip Technology |
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PIC17C756A Datasheet(HTML) 9 Page - Microchip Technology |
9 / 306 page 1998-2013 Microchip Technology Inc. DS30289C-page 9 PIC17C7XX 2.0 DEVICE VARIETIES Each device has a variety of frequency ranges and packaging options. Depending on application and pro- duction requirements, the proper device option can be selected using the information in the PIC17C7XX Prod- uct Selection System section at the end of this data sheet. When placing orders, please use the “PIC17C7XX Product Identification System” at the back of this data sheet to specify the correct part num- ber. When discussing the functionality of the device, memory technology and voltage range does not matter. There are two memory type options. These are speci- fied in the middle characters of the part number. 1. C, as in PIC17C756A. These devices have EPROM type memory. 2. CR, as in PIC17CR756A. These devices have ROM type memory. All these devices operate over the standard voltage range. Devices are also offered which operate over an extended voltage range (and reduced frequency range). Table 2-1 shows all possible memory types and voltage range designators for a particular device. These designators are in bold typeface. TABLE 2-1: DEVICE MEMORY VARIETIES 2.1 UV Erasable Devices The UV erasable version, offered in CERQUAD pack- age, is optimal for prototype development and pilot programs. The UV erasable version can be erased and repro- grammed to any of the configuration modes. Third party programmers also are available; refer to the Third Party Guide for a list of sources. 2.2 One-Time-Programmable (OTP) Devices The availability of OTP devices is especially useful for customers expecting frequent code changes and updates. The OTP devices, packaged in plastic packages, permit the user to program them once. In addition to the program memory, the configuration bits must be programmed. 2.3 Quick-Turnaround-Production (QTP) Devices Microchip offers a QTP Programming Service for fac- tory production orders. This service is made available for users who choose not to program a medium to high quantity of units and whose code patterns have stabi- lized. The devices are identical to the OTP devices but with all EPROM locations and configuration options already programmed by the factory. Certain code and prototype verification procedures apply before produc- tion shipments are available. Please contact your local Microchip Technology sales office for more details. 2.4 Serialized Quick-Turnaround Production (SQTPsm) Devices Microchip offers a unique programming service, where a few user defined locations in each device are pro- grammed with different serial numbers. The serial num- bers may be random, pseudo-random or sequential. Serial programming allows each device to have a unique number which can serve as an entry code, password or ID number. 2.5 Read Only Memory (ROM) Devices Microchip offers masked ROM versions of several of the highest volume parts, thus giving customers a low cost option for high volume, mature products. ROM devices do not allow serialization information in the program memory space. For information on submitting ROM code, please con- tact your regional sales office. Memory Type Voltage Range Standard Extended EPROM PIC17CXXX PIC17LCXXX ROM PIC17CRXXX PIC17LCRXXX Note: Not all memory technologies are available for a particular device. Note: Presently, NO ROM versions of the PIC17C7XX devices are available. |
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