memory products - Al Kossow's Bitsavers

M27256READ OPERATIONDC AND AC CONDITIONSSelection Code F1/-1 F1/- 2F11 - 20F1/- 25F1/- 30F1/- 45F1 F6/-4F6-3F1/-4F1Operating Temperature Range o to 70·C o to 70·C -40 to 85·CVCC Power Supply (1,2) 5V ±5% 5V ±10% 5V ±5%Vpp Voltage (2) Vpp = Vcc Vpp = Vcc Vpp = VccDC AND OPERATING CHARACTERISTICSSymbol Parameter Test ConditionsValuesMin. Typ. (3) Max,III Input Load Current VIN=5.5V 10 p.AILO Output Leakage Current VOUT=5.5V Hi p.AIpP1(2) Vpp Current Read Standby Vpp=5.5V 5 mAICC1(2) Vcc Current Standby CE=VIH 20 40 mAICC2(2) VCC Current Active CE=OE=VIL 45 100 mAVpp=VccVIL Input Low Voltage -0.1 +0.8 VVIH Input High Voltage 2.0 VCC+ 1 VVOL Output Low Voltage IOL=2.1 mA 0.45 VVOH Output High Voltage IOH = - 400 p.A 2.4 VVpP(2) Vpp Read Voltage Vcc=5V±0.25V 3.8 Vcc VUnitAC CHARACTERISTICSVcc± 5% 27256·1 27256·2 27256 27256·3 27256·4Symbol Parameter Vcc±10% 27256·20 27256·25 27256-30 27256-45 UnitTest Conditions Min Max Min Max Min Max Min Max Min MaxtACC Address to Output Delay CE=OE=VIL 170 200 250 300 450 nstCE CE to Output Delay OE=VIL 170 200 250 300 450 nstOE OE to Output Delay CE=VIL 70 75 100 120 150 nstOF(4) OE High to Output Float CE=VIL 35 0 55 0 60 0 105 0 130 nstOH Output Hold from Address CE-OE- VIL 0 0 0 0 0 nsCE or OE WhicheverOccurred FirstSymbol Parameter Test Conditions Min. Typ. Max. UnitCIN Input Capacitance VIN=OV 4 6 pFCOUT Output Capacitance VOUT=OV 8 12 pFNotea:1. Vee must be applied simultaneously or before Vpp and removed simultaneously or after Vpp.2. Vpp may be connected directly to Vee except during programming. The supply current would then be the sum of Icc and IpP1'3. Typical values are for T 8mb = 2S·C and nominal supply voltages. .4. This parameter is only sampled and not 100% tested. Output Float is defined as the point where data is no longer driven-seetiming diagram.5. This parameter is only sampled and not 100% tested.3/1065