XD74LS42

XD74LS42 DIP-16 This monolithic decimal decoder consists of eight inverters and ten four-input NAND gates. The inverters are connected in pairs to make BCD input data available for decoding by NAND gates. Full decoding of valid input logic ensures that all outputs remain off for all invalid input conditions. Pin Arrangement 0Y 1 16 VCC 15 A 14 B 13 C 12 D 11 9Y 10 8Y 9 7Y 0 1Y 2 1 2Y 3 2 A 3 Outputs 3Y 4 4Y 5 5Y 6 6Y 7 GND 8 Inputs B 4 5 C 6 7 8 D 9 Outputs (Top view) Function Table No. BCD input Decimal output 0 D L C L B L A L 0 L 1 H 2 H 3 H 4 H 5 H 6 H 7 H 8 H 9 H 1 2 L L L L L H H L H H L H H L H H H H H H H H H H H H H H 3 L L H H H H H L H H H H H H 4 L H L L H H H H L H H H H H 5 6 L L H H L H H L H H H H H H H H H H L H H L H H H H H H 7 8 L H H L H L H L H H H H H H H H H H H H H H L H H L H H 9 H H L L L H H L H H H H H H H H H H H H H H H H H H L H H H L H H L H L H H H H H H H H H H H H H H H H H H H H H H H H L H H L H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H H Invalid H H H; high level, L; low level 1 XD74LS42 DIP-16 Block Diagram A A 0Y A 1Y 2Y B B 3Y B 4Y C 5Y C 6Y D 7Y D 8Y Inputs Outputs C D 9Y Absolute Maximum Ratings Symbol Ratings Unit Supply voltage Input voltage Item VCC VIN 7 7 V V Power dissipation Storage temperature PT Tstg 400 –65 to +150 mW °C Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. 2 XD74LS42 DIP-16 Recommended Operating Conditions Item Supply voltage Output current Operating temperature Symbol Min Typ Max Unit VCC IOH 4.75 — 5.00 — 5.25 –400 V µA IOL Topr — –20 — 25 8 75 mA °C Electrical Characteristics (Ta = –20 to +75 °C) Item Input voltage Symbol min. typ.* max. Unit VIH VIL 2.0 — — — — 0.8 V V VOH 2.7 — — V — — 0.5 IIH — — — — 0.4 20 µA VCC = 5.25 V, VI = 2.7 V IIL II — — — — –0.4 0.1 mA mA VCC = 5.25 V, VI = 0.4 V VCC = 5.25 V, VI = 7 V — –100 mA VCC = 5.25 V Output voltage VOL Input current VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V, IOH = –400 µA IOL = 8 mA VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V IOL = 4 mA V Short-circuit output current Supply current IOS –20 ICC** — 7 13 mA Input clamp voltage VIK — — –1.5 V Condition VCC = 5.25 V VCC = 4.75 V, IIN = –18 mA Notes: * VCC = 5 V, Ta = 25°C ** VCC is measured with all outputs and all inputs grounded. Switching Characteristics (VCC = 5 V, Ta = 25°C) Item Symbol 2 Stage Propagation delay time 3 Stage 2 Stage 3 Stage tPLH tPHL min. — typ. 15 max. 25 — — 20 15 30 25 — 20 30 3 Unit Condition ns CL = 15 pF, RL = 2 kΩ ns XD74LS42 DIP-16 Testing Method Test Circuit VCC 4.5V 0 RL Output Input P.G. Zout = 50Ω See Function Table 1 2 A 3 B 4 5 C CL 6 7 D 8 9 Notes: 1. All diodes are 1S2074(H). 2. CL includes probe and jig capacitance. Waveform tTLH tTHL 90% 1.3 V Input 3V 90% 1.3 V 10% 10% 0V tPHL tPLH VOH In phase output 1.3 V 1.3 V VOL tPHL tPLH VOH Out of phase output 1.3 V 1.3 V VOL Note: Input pulse: tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle 50%. 4 XD74LS42 DIP-16 DIP16 45