1 - Al Kossow's Bitsavers

TMS27128131,072·BIT ERASABLE PROGRAMMABLE READ·ONLY MEMORYelectrical characteristics over full ranges of .recommended operating conditionsPARAMETER TEST CONDITIONS MIN Typt MAX UNITVOH High-level output voltage 10H = -400/lA 2.4 VVOL Low-level output voltage 10L = 2.1 rnA 0.45 VII Input current (leakage) VI = 0 V to 5.25 V ±10 /lA10 Output current (leakage) Vo = 0.4 V to 5.25 V ±10 /lAIpP1 Vpp supply current (read) Vpp = 5.25 V 5 rnAIpP2 Vpp supply current (program) E and PGM at VIL 50 rnAICC1 VCC supply current (standby) Eat VIH 40 rnAICC2 VCC supply current (active) E and G at VIL 100 rnAt Typical values are at T A = 25°C and nominal voltages.capacitance over recommended supply voltage range and operating free-air temperature range, f1 MHzPARAMETER TEST CONDITIONS MIN Typt MAX UNITCi Input capacitance VI = 0 V 4 6 pFCo Output capacitance Vo = 0 V 8 12 pFt Typical values are at T A = 25°C and nominal voltages.switching characteristics over recommended supply voltage range and operating free-air temperature range,CL = 100 pF, 1 Series 74 TTL load (see note 2 and figure 2)PARAMETERTMS27128-25 TMS27128-30 TMS27128-45MIN MAX MIN MAX MIN MAXtalA) Access time from address 250 300 450 nstalE) Access time from E 250 300 450 nsten(G) Output enable time from G 100 120 150 nstdis(G)+ Output disable time from G 0 60 0 105 0 130 nstv(A)Output data valid time after change of address,0 0 0 nsE, or 13, whichever occurs firstNOTE 2: For switching characteristics and timing measurements, input timing reference levels are 0.8 V and 2 V; output timing reference levels are 0.8 Vand 2 V.* Value calculated from 0.5 volt delta to measured output level; tdis(G) is specified from G or r, whichever occurs first. Refer to read cycle timing diagram.recommended conditions for fast programming routine, TA = 25°C (see note 2 and fast programmingcycle timing diagram)UNITCI)Q)CJ.S;Q)c:2:oa:D.WPARAMETER MIN NOM MAX UNITVCC Supply voltage (see Note 3) 5.75 6 6.25 VVPP Supply voltage (see Note 4) 20.5 21 21.5 Vtw(lPGM) PGM initial program pulse duration (see Note 5) 0.95 1 1.05 mstwIFPGM) PGM final Dulse duration (see Note 6) 3.8 63 mstsu(A) Address setup time 2 /lstsu(D) Data setup time 2 ,.stsu(VPP) VPP setup time 2 ,.stsu(VCC) VCC setup time 2 ,.sth(A) Address hold time 0 ,.sth(D) Data hold time 2 ,.stsu(E) E setup time 2 p.stsu(G) G setup time 2 p.s14TEXASINsrRuMENlSPOST OFFICE BOX 225012 • DALLAS, TEXAS 752656-65'