NTE74C240

NTE74C240 & NTE74C244 Integrated Circuit TTL− CMOS Octal Buffers and Line Drivers w/3−State Outputs 20−Lead DIP Description: The NTE74C240 (Inverting) and NTE74C244 (Non−Inverting) octal buffers and line drivers are monolithic complementary MOS (CMOS) integrated circuits in a 20−Lead DIP type package with 3−state outputs. These outputs have been specially designed to drive highly capacitive loads such as bus−oriented systems. These devices have a fan out of 6 low power Schottky loads. A high logic level on the output disable control input G makes the outputs go into the high impedance state. Features: D Wide Supply Range: 3V to 15V D High Noise Immunity: 0.45 VCC (typ) D Low Power Consumption D High Capacitive Load Drive Capability D 3−State Outputs D Input Protection D TTL Compatible D High Speed: 25ns (typ.) at 10V, 50pF (NTE74C244 ONLY) Absolute Maximum Ratings: (Note 1) Voltage at Any Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3V to VCC +0.3V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700mW Operating VCC Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 15V Maximum VCC Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +85°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C Note 1. “Absolute Maximum Ratings” are those values beyond which th safety of the device cannot be guaranteed. Except for “Operating Temperature Range”, they are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation. DC Electrical Characteristics: (TA = −40° to +85°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit VCC = 5V 3.5 − − V VCC = 10V 8.0 − − V VCC = 5V − − 1.5 V VCC = 10V − − 2.0 V 4.5 − − V 9.0 − − V − − 0.5 V VCC = 10V − − 1.0 V CMOS to CMOS Logical “1” Input Voltage Logical “0” Input Voltage Logical “1” Output Voltage VIN(1) VIN(0) VOUT(1) VCC = 5V IO = −10μA VCC = 10V Logical “0” Output Voltage VOUT(0) VCC = 5V IO = 10μA Logical “1” Input Current IIN(1) VCC = 15V, VIN = 15V − 0.005 1.0 μA Logical “0” Input Current IIN(0) VCC = 15V, VIN = 0V −1.0 −0.005 − μA Supply Current ICC VCC = 15V − 0.05 300 μA CMOS/LPTTL Interface Logical “1” Input Voltage VIN(1) VCC = 4.75V VCC−1.5 − − V Logical “0” Input Voltage VIN(0) VCC = 4.75V − − 0.8 V VOUT(1) VCC = 4.75V IO = −450μA VCC−0.4 − − V IO = −2.2mA 2.4 − − V − − 0.4 V VOUT = 0, TA = +25°C −14 −30 − mA −36 −70 − mA VOUT = VCC, TA = +25°C 12 20 − mA 48 70 − mA Logical “1” Output Voltage Logical “0” Output Voltage VOUT(0) VCC = 4.75V, IO = 2.2mA Output Drive Output Source Current (P−Channel) ISOURCE VCC = 5V VCC = 10V Output Sink Current (N−Channel) ISINK VCC = 5V VCC = 10V AC Electrical Characteristics: (TA = +25°, CL = 50pF, Note 2 unless otherwise specified) Parameter Propagation Delay (Data In to Out) NTE74C240 Symbol tPD(1), tPD(0) Test Conditions Min Typ Max Unit − 60 90 ns − 80 110 ns − 40 70 ns − 60 90 ns − 45 70 ns − 60 90 ns − 25 50 ns CL = 150pF − 40 70 ns RL = 1kΩ − 45 80 ns − 35 60 ns − 50 90 ns VCC = 10V − 30 60 ns VCC = 5V − 45 80 ns − 75 140 ns − 30 60 ns − 50 100 ns VCC = 5V CL = 150pF VCC = 10V CL = 150pF NTE74C244 VCC = 5V CL = 150pF VCC = 10V Propagation Delay Output Disable to High Impedance State (from a Logic Level) t1H, t0H Propagation Delay Output Disable to Logic Level (from High Impedance State) tH1, tH0 Transition Time VCC = 5V VCC = 10V tT(HL), tT(LH) VCC = 5V RL = 1kΩ CL = 150pF VCC = 10V CL = 150pF Note 2. AC Parameters are guaranteed by DC correlated testing. AC Electrical Characteristics (Cont’d): (TA = +25°, CL = 50pF, Note 2 unless otherwise specified) Parameter Symbol Test Conditions Power Dissipation Capacitance (Output Enabled Buffer) CPD Note 4 Power Dissipation Capacitance (Output Disabled Buffer) NTE74C240 CPD Note 4 NTE74C244 Input Capacitance (Any Input) CIN Output Capacitance (Output Disabled) CO VIN = 0V, f = 1Mhz, TA = +25°C Min Typ Max Unit − 100 − pF − 10 − pF − 0 − pF − 10 − pF − 10 − pF Note 2. AC Parameters are guaranteed by DC correlated testing. Note 3. Capacitance is guaranteed by periodic testing. Note 4. Cpd determines the no load AC power consumption of any CMOS device. ODA 1 1 0 0 Truth Table (NTE74C240): IA OA ODB IA X X 0 1 Z Z 1 0 1 1 0 0 X X 0 1 OB Z Z 1 0 1 = High Level 0 = Low Level X = Don’t Care Z = 3−State ODA 1 1 0 0 Truth Table (NTE74C244): IA OA ODB IA X X 0 1 Z Z 0 1 1 1 0 0 1 = High Level 0 = Low Level X = Don’t Care Z = 3−State Pin Connection Diagram ODA 1 20 VCC IA1 2 OB4 3 19 ODB 18 OA1 IA2 4 17 IB4 OB3 5 16 OA2 IA3 6 15 IB3 OB2 7 14 OA3 IA4 8 13 IB2 OB1 9 12 OA4 GND 10 11 IB1 X X 0 1 OB Z Z 0 1 20 11 1 10 .300 (7.62) 1.200 (30.5) Max .260 (6.6) Max .200 (5.08) Max .100 (2.54) Min .012 (0.30) .100 (2.54) Typ .350 (8.89)