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PC512-20 Datasheet(PDF) 2 Page - Texas Instruments |
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PC512-20 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 13 page TMS27C512 65536 BY 8BIT UV ERASABLE TMS27PC512 65536 BY 8BIT PROGRAMMABLE READONLY MEMORIES SMLS512G − NOVEMBER 1985 − REVISED SEPTEMBER 1997 2 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 description (continued) These devices are fabricated using power-saving CMOS technology for high speed and simple interface with MOS and bipolar circuits. All inputs (including program data inputs) can be driven by Series 74 TTL circuits without the use of external pullup resistors. Each output can drive one Series 74 TTL circuit without external resistors. The data outputs are 3-state for connecting multiple devices to a common bus. The TMS27C512 and the TMS27PC512 are pin compatible with 28-pin 512K MOS ROMs, PROMs, and EPROMs. The TMS27C512 EPROM is offered in a dual-in-line ceramic package (J suffix) designed for insertion in mounting hole rows on 15,2-mm (600-mil) centers. The TMS27PC512 OTP PROM is supplied in a 32-lead plastic leaded chip carrier package using 1,25-mm (50-mil) lead spacing (FM suffix). The TMS27C512 and TMS27PC512 are offered with two choices of temperature ranges of 0 °C to 70°C (JL and FML suffix) and − 40 °C to 85°C (JE and FME suffix). See Table 1. All package styles conform to JEDEC standards. Table 1. Temperature Range Suffixes EPROM AND SUFFIX FOR OPERATING FREE-AIR TEMPERATURE RANGES AND OTP PROM 0 °C TO 70°C −40 °C TO 85°C TMS27C512-xxx JL JE TMS27PC512-xxx FML FME These EPROMs and OTP PROMs operate from a single 5-V supply (in the read mode), thus are ideal for use in microprocessor-based systems. One other 13-V supply is needed for programming. All programming signals are TTL level. The device is programmed using the SNAP! Pulse programming algorithm. The SNAP! Pulse programming algorithm uses a VPP of 13 V and a VCC of 6.5 V for a nominal programming time of seven seconds. For programming outside the system, existing EPROM programmers can be used. Locations can be programmed singly, in blocks, or at random. |
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