1 1 document # eprom101 rev 01 revised march 2010 py291a 2k x 8 reprogrammable prom description the py291a is a 2kx8 cmos prom. the device is available in windowed packages which when exposed to uv light, the memory content in the prom is erased and can be reprogrammed. eprom technology is used in the memory cells for programming. the eprom requires a 12.5v for programming. devices are tested to insure that performance of the device meets the dc and ac specifcation limits after customer programming. to perform a read operation from the device, cs 1 is low and cs 2 and cs 3 are high. the memory contents in the address established by the address pins (a 0 to a 10 ) will become available on the outputs (o 0 to o 7 ). the py291a is available in 24-pin 300 mil ceramic dips (cerdip, windowed and non-windowed) and plastic dips (non-windowed). functional block diagram pin configur ation feat ures epr om technology for reprogramming high speed C 20/25/35/50 ns (commercial) C 25/35/50 ns (industrial) C 35/50 ns (military) low power operation: 660 mw single 5v10% power supply windowed devices for reprogramming fully ttl compatible inputs and outputs standard pinout (jedec approved) C 24-pin 300 mil dip C windowed ce rdip C non-windowed ce rdip C non-windowed plastic dip dip (p4, d4, wd1) note: window on wd1 package only
py291a page 2 of 9 document # eprom101 rev 01 maximum ratings (1) symbol parameter value u nit v cc power supply pin with C0.5 to +7 v respect to gnd terminal voltage with C0.5 to v term respect to gnd v cc +0.5 v (up to 7.0v) v pp program voltage 13 v symbol parameter value u nit t a operating temperature C55 to +125 c t bias temperature under C55 to +125 c bias t stg storage temperature C65 to +150 c p t power dissipation 1.0 w i out dc output current 50 ma symbol parameter conditions typ. u nit c in input capacitance v in = 0v 10 pf c out output capacitance v out = 0v 10 pf grade (2) ambient temp gnd vcc commercial 0c to +70c 0v 5.0v 10% industrial -40c to +85c 0v 5.0v 10% military -55c to +125c 0v 5.0v 10% recommended oper ating conditions capacitances (4) (v cc = 5.0v, t a = 25c, f = 1.0mhz) dc electr ical characteristics over recommended operating temperature and supply voltage (2) v pp programming supply voltage 12 13 50 v ma programming supply current i pp symbol v ih v il v hc v lc v ol v oh i li i lo parameter input high voltage input low voltage cmos input high voltage cmos input low voltage output low voltage (ttl load) output high voltage (ttl load) input leakage current output leakage current test conditions i ol = +16 ma, v cc = min. i oh = C4 ma, v cc = min. v cc = max. v in = gnd to v cc v cc = max., ce = v ih , v out = gnd to v cc py291a min 2.0 C0.5 (3) v cc C0.2 C0.5 (3) 2.4 C10 C10 max v cc 0.8 v cc +0.5 0.2 0.4 +10 +10 unit v v v v v v a a i cc symbol parameter temperature range dynamic operating current* commercial industrial military C20 n/a C25 C50 unit ma ma ma power dissipation characteristics vs. speed n/a 90 90 120 n/a 90 90 90 90 90 90 C35 v ihp input high programming voltage 3.0 v v ilp input low programming voltage 0.4 v
py291a page 3 of 9 document # eprom101 rev 01 ac electr ical characteristicsread cycle (v cc = 5v 10%, all temperature ranges) (2) timing wavefo rm of read cycle notes: 1. stresses greater than those listed under maximum r atings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specifcation is not implied. exposure to maximum rating conditions for extended periods may affect reliability. 2. extended temperature operation guaranteed with 400 linear feet per minute of air fow. 3. transient inputs with v il and i il not more negative than C3.0v and C100ma, respectively, are permissible for pulse widths up to 20 ns. 4. this parameter is sampled and not 100% tested. symbol parameter -20 -25 -35 -50 unit min max min max min max min max t aa address to output valid 20 25 35 50 ns t hzcs1 chip select inactive to high z 15 15 20 20 ns t acs1 chip select active to output valid 15 15 20 20 ns t hzcs2 chip select inactive to high z 22 27 35 45 ns t acs2 chip select active to output valid 22 27 35 45 ns t pu chip select active to power-up 0 0 0 0 ns t pd chip slect inactive to power-down 22 27 35 45 ns
py291a page 4 of 9 document # eprom101 rev 01 device erasure if the device is subjected to wavelengths of light below 4000 angstroms, device erasure will commence. it is therefore recommended to use an opaque label over the window in the event the device will be exposed to lighting for a long time. the uv dose for erasure requires a wavelength of 2,537 angstroms for a minimum dose of 25 wsec/cm 2 . if using a uv lamp of 12 mw/cm 2 , the exposure time is estimated to be 35 minutes. devices should be positioned within 1 inch of the lamp during the erasure process. permanent damage can occur to the devices if exposed to uv light for an extended period of time. mode selection programming pinouts x = don't care pin function mode read or output disable a 10 -a 0 cs 3 cs 2 cs 1 o 7 -o 0 other a 10 -a 0 pgm vfy v pp d 7 -d 0 read a 10 -a 0 v ih v ih v il o 7 -o 0 output disable a 10 -a 0 x x v ih high z output disable a 10 -a 0 x v il x high z output disable a 10 -a 0 v il x x high z program a 10 -a 0 v ilp v ihp v pp d 7 -d 0 program verify a 10 -a 0 v ihp v ilp v pp o 7 -o 0 program inhibit a 10 -a 0 v ihp v ihp v pp high z intelligent program a 10 -a 0 v ilp v ihp v pp d 7 -d 0 blank check zeros a 10 -a 0 v ihp v ilp v pp zeros
py291a page 5 of 9 document # eprom101 rev 01 input pulse levels gnd to 3.0v input rise and fall times 3ns input timing reference level 1.5v output timing reference level 1.5v output load see figures 1 and 2 ac test conditions figure 1. output load figure 2. thevenin equivalent * including scope and test fxture. note: because of the ultra-high speed of the py291a, care must be taken when testing this device; an inadequate setup can cause a normal functioning part to be rejected as faulty. long high-inductance leads that cause supply bounce must be avoided by bringing the v cc and ground planes directly up to the contactor fngers. a 0.01 f high frequency capacitor is also required between v cc and ground.
py291a page 6 of 9 document # eprom101 rev 01 ordering infor mation
py291a page 7 of 9 document # eprom101 rev 01 ceramic du al in-line package (non-windowed) ceramic du al in-line package (windowed) pkg # d4 # pins 24 (300 mil) symbol min max a - 0.200 b 0.014 0.026 b2 0.045 0.065 c 0.008 0.018 d - 1.280 e 0.220 0.310 ea 0.300 bsc e 0.100 bsc l 0.125 0.200 q 0.015 0.060 s1 0.005 - 0 15 pkg # wd1 # pins 24 (300 mil) symbol min max a - 0.200 b 0.014 0.026 b2 0.045 0.065 c 0.008 0.018 d - 1.280 e 0.220 0.310 ea 0.300 bsc e 0.100 bsc l 0.125 0.200 q 0.015 0.060 s1 0.005 - 0 15 wd 0.175
py291a page 8 of 9 document # eprom101 rev 01 plastic du al in-line package pkg # p4 # pins 24 (300 mil) symbol min max a - 0.210 a1 0.015 - b 0.014 0.022 b2 0.045 0.070 c 0.008 0.014 d 1.230 1.280 e1 0.240 0.280 e 0.280 0.325 e 0.100 bsc eb - 0.430 l 0.115 0.160 0 15
py291a page 9 of 9 document # eprom101 rev 01 revisions document number eprom101 document title py291a 2k x 8 reprogrammable prom rev issu e date or iginator description of change or jun-2007 jdb new data sheet 01 mar-2010 jdb added industrial temperature range
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