1 - Al Kossow's Bitsavers

TMS4725632,768·WORD BY 8·BIT READ·ONLY MEMORYabsolute maximum ratingsSupply voltage to ground potential (see Note ·1) .................................. - 0.5 V to 7 VApplied output voltage (see Note 1) ............................................. - 1 V to 7 VApplied input voltage (see Note 1) .............................................. - 1 V to 7 VPower dissipation .............................................................. 500 mWOperating free-air temperature ................................................. OOC to 70°CStorage temperature ..................................................... - 55°C to 150°CNOTE 1:Voltage values are with respect to vss.recommended operating conditionsPARAMETER MIN NOM MAX UNITSupply voltage. VCC 4.5 5 5.5 VHigh-level input voltage. VIH 2 VCC VLow-level input voltage. VIL -1 0.8 VOperating free-air temperature. T A 0 70 °Celectrical characteristics, T A o °C to 70°C, VOO 5 V ±. 10% (unless otherwise noted)PARAMETER TEST CONDITIONS MIN MAX UNITVOH High-level output voltage Vee = 4.5 V. IOH = -1 rnA 2.4 VVOL Low-level output voltage VCC = 4.5 V. 10L = 2.1 rnA 0.4 VII Input current Vee 5.5 V. Ov :$ VIN :$ 5.5 V 10 p.A10 Output leakage current Vo = 0.4 V to Vcc. Chip deselected ±10 p.AICC1 Supply current from VCC (active) VCC = 5.5 V. VI = VCC Output not loaded 60 rnAICC2 Supply current from VCC (power down) VCC = 5.5 V 12 rnACi Input capacitanceVo = 0 V.TA = 25°C.f = 1 MHz6 pFCo Output capacitanceVo = 0 V.TA = 25°C.f = 1 MHz12 pFenQ)(J'S;Q)Q:2Eoa:switching characteristics, T A5 V ± 10%, see figure 1 tPARAMETER- TMS47256-25 TMS47256-35 TMS47256-45MIN MAX MIN MAX MIN MAXUNITta(AD) Access time from address 250 350 450ta(S) Access time from chip select 120 120 120ta(PD) Access time from power down/chip enable 250 350 450tvtA) Output data valid after address change 10 10 10 nstdis Output disable time from chip select/chip enable 100 100 100tentS) Output enable time from chip select 10 10 10ten(E) Output enable time from chip enable 10 10 10tAli AC measurements are made at 10% and 90% points.34TEXASINSTRUMENTSPOST OFFICE BOX 225012 • DALLAS, TEXAS 752657-41