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a27020 series 256k x 8 otp cmos eprom (october, 2010, version 1.3) amic technology, corp. document title 256k x 8 otp cmos eprom revision history rev. no. history issue date remark 0.0 initial issue august 2, 2002 preliminary 1.0 final version release october 7, 2003 final 1.1 change vpp from 12.75v to 12.25v june 16, 2005 modify the program power supply 1.2 add a27020l-70f pb-free type december 7, 2005 1.3 remove non pb-free type october 22, 2010
a27020 series 256k x 8 otp cmos eprom (october, 2010, version 1.3) 1 amic technology, corp. features ? 262,144 x 8 bit organization ? programming voltage: 12.25v ? access time: 55/70 ns (max.) ? current: operating: 30ma (max.) at 5mhz standby: 100 a (max.) ? all inputs and outputs are directly ttl-compatible ? available in 32-pin dip and 32-pin plcc packages ? all pb-free (lead-free) pr oducts are rohs compliant general description the a27020 chip is a high-performance 2,097,152 bit one-time programmable read only memory (otp eprom) organized as 256k by 8 bits. the a27020 requires only 5v power supply in normal read mode operation and any input signals are ttl levels. the a27020 is available in industry standard 32 pin dual-in- line and 32 pin plcc packages. pin configurations ? dip ? plcc vpp a16 a15 a12 a7 a6 a5 a4 a3 a2 i/o 0 i/o 1 i/o 3 i/o 4 i/o 5 a11 a9 a13 vcc a10 a27020 1 2 3 4 5 6 7 8 9 10 11 12 13 14 19 20 21 22 23 24 25 26 27 28 29 30 31 32 a8 i/o 2 gnd i/o 6 i/o 7 ce a14 18 15 16 17 a1 a0 oe pgm a17 a27020l a7 a9 i/o 7 ce a6 a5 a4 a3 a2 a1 a0 i/o 0 a8 a13 a14 a12 a15 a16 vpp vcc a17 i/o 1 i/o 2 gnd i/o 4 i/o 5 i/o 6 1 2 3 4 5 6 7 8 9 10 11 12 13 32 31 30 14 16 15 17 18 19 20 21 22 23 24 25 26 27 28 29 a11 oe a10 i/o 3 pgm
a27020 series (october, 2010, version 1.3) 2 amic technology, corp. pin configurations pin name function a0-a17 address inputs i/o 7 -i/o 0 data inputs / outputs ce chip enable oe output enable pgm program strobe vpp program power supply vcc power supply gnd ground operating modes and truth table mode ce oe pgm a0 a1 a9 vpp vcc i/o 7 -i/o 0 read v il v il x x x x vcc vcc data out output disable v il v ih x x x x vcc vcc hi-z standby v ih x x x x x vcc vcc hi-z program v il v ih v il pulse x x x 12.25v 5.25v data in program verify v il v il v ih x x x 12.25v 5.25v data out program inhibit v ih x x x x x 12. 25v 5.25v hi-z manufacturer code (3) v il v il v ih v il v il v id vcc vcc 37h device code (3) v il v il v ih v ih v il v id vcc vcc 64h continuation code (3) v il v il v ih v il v ih v id vcc vcc 7fh notes: 1. x = either v ih or v il . 2. v id = 12v 0.5v. 3. a2 ~ a8 = a10 ~ a17 = v il (for auto identification)
a27020 series (october, 2010, version 1.3) 3 amic technology, corp. functional description read mode the a27020 has two control functions, both of which must be logically active in order to obtain data at the outputs. ce is the power control and should be used for device selection. oe is the output control and should be used to data to the output pins, which is independent of device selection. assuming that addresses are stable, address access time (t aa ) is equal to the delay from ce to output (t ce ). data is available at the output after a delay (t oe ) from the falling edge of oe , as long as ce has been low and the addresses have been stable for at least t acc - t oe . standby mode the a27020 has a standby mode which reduces the active current from 30ma to 100 a. the a27020 is placed in the standby mode by applying a cmos high signal to ce . when in the standby mode, the output are in a high impedance state, independent of the oe . auto identify mode the auto identify mode allows the reading out of a binary code from a eprom that will identify its manufacturer and type. this mode is intended for use by programming equipment for the purpose of automatically matching the device to be programmed with its corresponding programming algorithm. to activate the mode, the programming equipment must apply 12.0v 0.5v on address line a9 of the a27020. three identification code can be read from data output pin by toggling a0 and a1. the other addresses must be held at v il during this mode. byte 0 (with a0 at v il , a1 at v il ) represents the manufacturer code which is 37h. byte 1 and byte 2 represent the device code and continuation code, which is 64h and 7fh respectively. all identifiers for these codes will possess odd parity, with msb (io 7 ) defined the parity bit. absolute maximum ratings* ambient operating temperature (t a ) . . ..-10 c to +85 c storage temperature plastic package (t stg ) ??????????????? 55 c to 125 c applied input voltage (v i ): all pins except a9, vpp and vcc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. -0.6v to vcc + 0.6v a9, vpp.. . . . . . . . . . . . . . . . . . . . . .. .-0.6v to 12.5v vcc . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6v to 7.0v output voltage (v o ) . . . . . . . . . . . -0.6v to 6.0v (note 1) *comments stresses above those listed under "absolute maximum ratings" may cause permanent damage to this device. these are stress ratings only. functional operation of this device at these or any other conditions above those indicated in the operational sect ions of this specification is not implied or intended. exposure to the absolute maximum rating conditions for extended periods may affect device reliability. notes: 1. during voltage transitions, the input may undershoot gnd to -2.0v for periods less than 20 ns. maximum dc voltage on input and i/o may overshoot to vcc + 2.0v for periods less than 20 ns. 2. when transitions, a9 and vpp may undershoot gnd to -2.0 v for periods less than 20 ns. maximum dc input voltage on a9 and vpp is +12.5v which may overs hoot to 12.7v for period less than 20 ns.
a27020 series (october, 2010, version 1.3) 4 amic technology, corp. read mode dc electrical characteristics (ta = 0 c to 70 c, vcc = 5v 10%, vpp = vcc) symbol parameter min. max. unit conditions v oh output high voltage 2.4 v i oh = -400 a v ol output low voltage 0.4 v i ol = 2.1ma v ih input high voltage 2.0 vcc + 0.5 v v il input low voltage -0.5 0.8 v i li input leakage current -1 +1 a vcc = max. vin = 0v to vcc i lo output leakage current -1 +1 a vcc = max. vout = 0v to vcc i cc vcc read operating current 30 ma vcc = max. ce = v il , oe = v il iout = 0ma, at 5mhz i sb vcc standby current (ttl) 1 ma vcc = max. ce = v ih i sb1 vcc standby current (cmos) 100 a vcc = max. ce = vcc - 0.2v i pp vpp current during read 10 a ce = oe = v il , vpp = vcc i id a9 auto select current 100 a a9 = v id , vcc = max. capacitance (t a = 25 c, f = 1.0mhz) symbol parameter min. max. unit conditions c in input capacitance 8 pf v in = 0v c out output capacitance 8 pf v out = 0v * these parameters are sampled and not 100% tested.
a27020 series (october, 2010, version 1.3) 5 amic technology, corp. read mode ac characteristics (ta = 0 c to 70 c, vcc = 5v 10%, vpp = vcc) symbol parameter 55ns 70ns unit min. max. min. max. t cyc cycle time 55 70 ns t aa address access time 55 70 ns t ce chip enable access time 55 70 ns t oe output enable access time 30 35 ns t oh output hold after address, ce or oe , whichever occurred first 0 0 ns t hz output high z delay 20 20 ns read mode switching waveforms t oh t hz high-z t aa t oe t ce valid output address valid address ce oe output t cyc
a27020 series (october, 2010, version 1.3) 6 amic technology, corp. ac measurement conditions for 55 ns c input rise and fall times 10 ns d input pulse voltage: 0v to 3volt e input and output timing ref. voltage: 1.5volt 3.0v 0v 1.5v 1.5v test points input output for 70 ns c input rise and fall times 10 ns d input pulse voltage: 0.4v to 2.4volt e input and output timing ref. voltage: 0.8v to 2.0volt 2.4v 0.4v 2.0v 2.0v test points input output 0.8v 0.8v ac testing load circuit c l = 30pf or 100pf out 3.3k 1n914 1.3v device under test c l = 30pf for 55 ns c l = 100pf for 70/90 ns c l includes jig capacitance
a27020 series (october, 2010, version 1.3) 7 amic technology, corp. programming and program verify the programming flowchart is shown in page 10. the a27020 is shipped with all bits being set to "1". programming causes relevant bits to be changed to "0". the programming mode is started by setting vcc to +5.25v and vpp to +12.25v, while ce and pgm are at v il , and oe is at v ih . data to be programmed can be directly input in the 8 bit format through the data bus. the write programming algor ithm reduces programming time by using 100 s pulse followed by a byte verification to determine whether the byte has been successfully programmed. if the data does not pass the verification, an additional pulse programming is applied for a maximum of 25 pulses. on completion of 1 byte programming and, the verified address is incremented. after the final address is completed, all bytes are verified again with vcc = 5.0 volt. program inhibit this mode is used to program one of multiple a27020 whose oe , pgm , vpp, vcc, address bus and data bus are connected in para llel. when programming is performed, other a27020 can be inhibited from being programmed by setting their ce pins to v ih . programming mode dc characteristics (ta = 0 c to 70 c, vcc = 5.25v 0.25v, vpp = 12.25v 0.25v) symbol parameter min. m ax. unit test conditions v oh output high voltage 2.4 v i oh = -400 a v ol output low voltage 0.4 v i ol = 2.1ma v ih input high voltage 2.0 vcc + 0.5 v v il input low voltage -0.5 0.8 v i li input leakage current -1 +1 a vcc = max. vin = 0v to vcc i cc vcc current during program 50 ma i pp vpp current during program 50 ma ce = v il v id a9 auto select voltage 11.5 12.5 v a9 = v id vcc1 programming supply voltage 5.0 5.5 v vpp1 programming voltage 12.0 12.5 v note: vcc must be applied simultaneously or bef ore vpp and removed simultaneously or after vpp.
a27020 series (october, 2010, version 1.3) 8 amic technology, corp. programming mode ac characteristics (ta = 0 c to 70 c, vcc= 5.25v 0.25v, vpp = 12.25v 0.25v) symbol parameter min. max. unit t as address valid to program low 2 s t ds input valid to program low 2 s t vps vpp high to program low 2 s t vcs vcc high to program low 2 s t ces ce low to program low 2 s t pw program pulse width 95 105 s t dh program high to input transition 2 s t oes input transition to oe low 2 s t oe oe low to output valid 100 ns t ohz oe high to output hi-z 130 ns t ah oe high to address transition 0 ns
a27020 series (october, 2010, version 1.3) 9 amic technology, corp. programming and verify mode ac waveforms t oes t pw t ces t vcs t vps t ds t as program program verify valid data in data out t dh t oe t ohz t ah address data vpp vcc ce pgm oe v ih v il v ih v ih vcc vcc1 vcc vpp1 v il v ih v il v il
a27020 series (october, 2010, version 1.3) 10 amic technology, corp. programming flowchart start address=first location vcc=5.25v vpp=12.25v x = 0 program one 100us pulse increment x x = 25? verify byte last address vcc=vpp=5.0v verify all bytes ? device passed device failed increment address fail no yes no pass yes fail pass verify byte pass fail verify section interactive section
a27020 series (october, 2010, version 1.3) 11 amic technology, corp. ordering information part no. access time (ns) operating current max. (ma) at 5mhz standby current max. ( a ) package a27020-55f 55 30 100 32pin pb-free dip a27020l-55f 55 30 100 32pin pb-free plcc a27020-70f 70 30 100 32pin pb-free dip a27020l-70f 70 30 100 32pin pb-free plcc
a27020 series (october, 2010, version 1.3) 12 amic technology, corp. package information p-dip 32l outline dimensions unit: inches/mm 1 32 e a 2 a l e 1 e a d c b 1 b a 1 base plane seating plane 16 17 e dimensions in inches dimensions in mm symbol min nom max min nom max a - - 0.210 - - 5.334 a 1 0.015 - - 0.381 - - a 2 0.149 0.154 0.159 3.785 3.912 4.039 b - 0.018 - - 0.457 - b 1 - 0.050 - - 1.270 - c - 0.010 - - 0.254 - d 1.645 1.650 1.655 41.783 41.91 42.037 e 0.537 0.542 0.547 13.64 13.767 13.894 e 1 0.590 0.600 0.610 14.986 15.240 15.494 e a 0.630 0.650 0.670 16.002 16.510 17.018 e - 0.100 - - 2.540 - l 0.120 0.130 0.140 3.048 3.302 3.556 0 - 15 0 - 15 notes: 1. the maximum value of dimension d includes end flash. 2. dimension e does not include resin fins.
a27020 series (october, 2010, version 1.3) 13 amic technology, corp. package information plcc 32l outline dimension unit: inches/mm a 1 a 2 a e d y h d d 13 g d b 1 b g e c 5 14 20 21 29 30 32 1 4 e h e l dimensions in inches dimensions in mm symbol min nom max min nom max a - - 0.134 - - 3.40 a 1 0.0185 - - 0.47 - - a 2 0.105 0.110 0.115 2.67 2.80 2.93 b 1 0.026 0.028 0.032 0.66 0.71 0.81 b 0.016 0.018 0.021 0.41 0.46 0.54 c 0.008 0.010 0.014 0.20 0.254 0.35 d 0.547 0.550 0.553 13.89 13.97 14.05 e 0.447 0.450 0.453 11.35 11.43 11.51 e 0.044 0.050 0.056 1.12 1.27 1.42 g d 0.490 0.510 0.530 12.45 12.95 13.46 g e 0.390 0.410 0.430 9.91 10.41 10.92 h d 0.585 0.590 0.595 14.86 14.99 15.11 h e 0.485 0.490 0.495 12.32 12.45 12.57 l 0.075 0.090 0.095 1.91 2.29 2.41 y - - 0.003 - - 0.075 0 - 10 0 - 10 notes: 1. dimensions d and e do not include resin fins. 2. dimensions g d & g e are for pc board surface mount pad pitch design reference only.

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