MCM7643 MOTOROLA | Alldatasheet

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4096-BIT PROGRAMMABLE READ ONLY MEMORY ‘The MCM7643 and MCM7643A, together with various other 76xx ™ series TTL PROMS, comprise a complete and compatible family = having common de electrical characteristics and identical program- 4096-BIT PROGRAMMABLE °o ming requirements. They are fully decoded, high-speed, field- READ ONLY MEMORIES x programmable ROMs and are availablein commonly used organiza- ba oa tions, with three-state outputs. All bits are manufactured storing @ 4 logical “1” (outputs high), and can be selectively programmed for MCM7643.A — 1024 x4 THREE-STATE - logical “0 (outputs low). Ee The field-programmable PROM can be custom-programmed to any pattern using a simple programming procedure. Schottky bipolar circuitry provides fast access time. All pinouts are compatible to industry-standard PROMs and ROMs. In addition to the conventional storage array. extra test rows and columns are included to assure high programmability, and guaran- tee parametric and ac performance. Fuses in these test rows and ‘columns are blown prior to shipment. PIN ASSIGNMENT © Common de Electrical Characteristics and Programming Procedure MCM76430C/ADC ‘© Simple, High-Speed Programming Procedure MCM7643PC/APC {1.0 Second per 1024 Bits, Typical) © Expandable — Three-State Outputs and Chip Enable Inputs tote VecF 18 © Inputs and Outputs TTL-Compatible om id me Low Input Current — 250 uA Logic “0”, 40 uA Logic “1” 3 agri Full Output Drive — 16 mA Sink, 2.0 mA Source “ae laid mead a0 = @ Fast Access Time — Guaranteed for Worst-Case N2 Sequencing, tga Sb ‘Over Commercial Temperature and Voltage Ranges aan es eeu © Pin-Compatible with Industry-Standard PROMs and ROMs eolar oak tt

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ABSOLUTE MAXIMUM RATINGS (See Note) fang symbat_[ Vane [unt] a Operating Output Voltage Vou — 770 | ve ‘Supply Current __ Tec 50 | made Taput Current lin “20 made Oueput Sink Current e100 | mace | ‘Operating Temperature Range Ta °C MCM7643x0xx Storage Temperature Range Tag “e510 r150 | °C ‘Maximum Junction Temperature Ty 75 °e NOTE Permanent device damage may occur ABSOLUTE MAXIMUM RATINGS are exceeded Functional operation shouldbe restricted to RECOMMENDED OPERATING CONDITIONS. Exposure to ugha thon recommended vokages for extended periods of time could attect vice relisbity {White programming, follow the programming specications 9-11

GUARANTEED OPERATING RANGE (Ta = 0°C to +75°C) _—_—__ Parameter Symbol [win [Nom [Mex [nt] = SppiyVorage 0 ce [476 50 a8 | vee | re Input High Voge in 20 ee x Input Low Votoge ra ~~ [8 | vee « ae ee ee z DC OPERATING CONDITIONS AND CHARACTERISTICS Three-State Output e [mia [pee feo | mp Una im | Adsresa7énabie 1" | Viw= Veg Max a0 wae tte | Input Curent o- | vesoasv 025 | made Pars vou “0° | lors st6ma Yoo Min os | Vee Output Disabled 1" | Vow= +5.25 V. Voc Max 40 wAde tote _ | current 0° | Vor'= #03. Vee Man 40 | nae Tos} Oupu Short Creu Cuvent| Vee Max. Vous 00V 0] aa One Output Oniy for 1.08 Max Aliinputs Grounded CAPACITANCE {f= 1.0 MHz, Ta = 25°C. periodically sampled rather than 100% tested.) fT harness [tye [une OupuiCepaciance SSCS Gor | 10 | oF | AC OPERATING CONDITIONS AND CHARACTERISTICS (Full operating voltage and temperature) [wew76s[ wom7eesa Oe +75°C O10 175°C [sie Pas | ae [a a Unit | Aaiess to Output Access Tinw | twa [0 | 90 | ao [0 [cro tnabieacsessrine ea | Pe fs fe P| NOTE: AC limits guaranteed for worst case N2 sequential with maximum test frequency of §.0 MHz. TIMING DIAGRAM AE TEST LOAD pve way ee Ten Point os Output 1S XX “O° Outpet 1.5V ¥ fi Sv 30nF° 600 912

The PROMS are manufactured with all bits/outputs Logical for programming, Note that the PROM is supplied with “1 "[Output High). Any desired Bit/output can be progremmed {uses intact generating an output high. Programming ® toa Logical "(Output Low) by following the simple procedure fuse will eauze the output to go low inthe verity mode. shown below. One may build his own programmer to setisty the 6. Otherbits nthe same word may be programmed while the Specifications described in Table 1, or buy any of the commer” cc inputs raisedte Vp} by applying output eneble pulses Clally available programmers which meet these apecifictions to each output which isto be programmed. The output, These PROMS can be programmed automatically or by the man: fensble pulses must be separated by a minimum interval ust procedure shown below att PROGRAMMING PROCEDURE 7. Lower Vcc 104.5 Volts following adelay of tgfrom the last = 10 ragramming enable pulse applied 1 an output Sone EDR ryadéressoftheseleced a. esramming arable ute aad anoubu fe} todo be programmed. Address inputs are TTU-compe (automa CS input « Sle An open orcut snout ot bused fo ares the a. Weny bit done not riya ropramred, peat ape 2 a 2, PROM chip by eppling input high (iy) tothe € through until the bithas raceiveda total of .Omsof ro- 4 ramming time. Bits which do not program within 1.0 me seput. CS saput must cemain at Vin for programming. The seperate. Bl whica de not prenrass akin | Ome - chip etlec a TTu-compectle, An open cuit hou not inay be considered programming rejects. Multiote pulse of = be used to disable the chip. programming speed 3, Disable the programming circuitry by apelying an Output 10. Repeat Steps T through 9 for all other bits to be pro- Voltage Disable of less than Vopp to the output of the grammed in the PROM. PROM. The outputmaybe letopen toachieve the disable 11, Programming rejects returned tothe factory must be 4, Raise Vcc to Vpy with rise time equal tot accompanied by dota giving address with desired and 5. After a delay equalto or greater than tg, apply 2 pulse with ‘ctual output data ofa location in which a programming amplitude ot Vope and duration ofp tothe output selected feiture has occured, TABLE 1 — PROGRAMMING SPECIFICATIONS [“Symbot [Parameter Min typ Mex nit Vin) Address Input v vi__| Votiage t) v Ven | Progranming/Vanly 1178 i225 v Veu__| Voltage to Voc _ | as 55 _v yeep Prostamiming Voltage Current Limit 00 600 850 ma with VpH Applied ™ _ | Voltage Rise and 70 10 76 Fall Time vo 10 10 ‘ Programming Delay _— 700 tp Programming Pulse Width 7000 ¢__| Programming Buty Cyele 30 ‘Output Vartage Vore Enable vor Disable (2) [lore | Suwa Vonoge nate cuvenr [20 “10 | Ta | Ambient Temperature - —e 75 °c COV Adarese and Gp select shoul nat be lf open for Vn {2} Oat conan wl be met with ouput open exc FIGURE 1 ~ TYPICAL PROGRAMMING WAVEFOSMS <0 <o Yeu ——— “raz vee 10% ven a a ey " one _| — onte2 Daten J © 9-13

s an [| z wf 2 a a ABO Column 1 of 64 64 4096-811 a 2) | Address || Cotumn Memory Array E Py nd a noe rott6} roti6 | roft6 | rote ws 9-14