XD74LS145

XD74LS145 DIP-16 This BCD-to-decimal decoder / driver 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 the NAND gates. Full decoding of valid BCD input logic ensures that all outputs remain off for all invalid binary input conditions. This decoder features highperformance, n-p-n output transistors designed for use as indicator / relay drivers or as open-collector logic-circuit drivers. Pin Arrangement Y0 1 16 VCC 15 A 14 B 13 C 12 D 11 Y9 10 Y8 9 Y7 0 Y1 2 1 Y2 3 2 A 3 Outputs Y3 4 Y4 5 Y5 6 Y6 7 GND 8 Inputs B 4 5 C 6 7 8 D 9 Outputs (Top view) Function Table No. 0 1 2 3 4 5 6 7 8 9 Invalid Inputs Outputs D L L L L C L L L L B L L H H A L H L H 0 L H H H 1 H L H H 2 H H L H 3 H H H L 4 H H H H 5 H H H H 6 H H H H 7 H H H H 8 H H H H 9 H H H H L L L L H H H H H L L L H H L L H L H L H H H H H H H H H H H H H H H H H H H H L H H H H H L H H H H H L H H H H H L H H H H H L H H H H H H H H H H H H L L L H H H H L H H L L H H H L 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 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 H H H H H H H H L H H H H H H 1 XD74LS145 DIP-16 Preliminary Block Diagram Y0 A Y1 Y2 Y3 B Inputs Y4 Outputs Y5 C Y6 Y7 D Y8 Y9 Absolute Maximum Ratings Symbol Ratings Unit Supply voltage Item VCC 7 V Input voltage VIN 7 V Power dissipation PT 400 mW Tstg –65 to +150 C Storage temperature Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Recommended Operating Conditions Item Supply voltage Symbol Min Typ Max Unit VCC 4.75 5.00 5.25 V Off-state output voltage VO(off) — — 15 V Low level output current IOL — — 80 mA Operating temperature Topr –20 25 75 C 2 XD74LS145 DIP-16 Preliminary Electrical Characteristics Item (Ta = –20 to +75 °C) Symbol VIH VIL min. 2.0 — typ.* — — max. — 0.8 Unit V V Off-state output current IO(off) — — 250 A On-state output voltage VO(on) — — — — 0.4 0.5 V — — — — — — — — — — 7 — 3.0 20 –0.4 0.1 13 –1.5 A mA mA mA V Input voltage Input current IIH IIL Supply current** Input clamp voltage II ICC VIK Condition VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V, VO(off) = 15 V IOL = 12 mA VCC = 4.75 V, VIH = 2 V, IOL = 24 mA VIL = 0.8 V IOL = 80 mA VCC = 5.25 V, VI = 2.7 V VCC = 5.25 V, VI = 0.4 V VCC = 5.25 V, VI = 7 V VCC = 5.25 V VCC = 4.75 V, IIN = –18 mA Notes: * VCC = 5 V, Ta = 25°C ** ICC is measured with all outputs open and all inputs grounded. Switching Characteristics (VCC = 5 V, Ta = 25°C) Item Propagation delay time Symbol tPLH tPHL min. — — typ. — — 3 max. 50 50 Unit ns Condition CL = 45 pF, RL = 665  XD74LS145 DIP-16 Preliminary Testing Method Test Circuit VCC 4.5V Output 0 RL See Testing Table 1 Input P.G. Zout = 50Ω 2 A 3 B 4 5 C CL 6 7 D 8 9 Waveform tTLH tTHL Input 3V 90% 1.3 V 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 XD74LS145 DIP-16 Preliminary DIP 45