HD74LS155P. Dual 2-line-to-4-line Decoders / Demultiplexers. Features. Pin Arrangement. REJ03D Rev.2.00 Feb

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1 Dual 2-line-to-4-line Decoders / Demultiplexers REJ03D Rev.2.00 Feb This circuit features dual 1-line-to-4-line demultiprexer with individual strobes and common binary-address input. When both sections are enabled by the strobes, the common binary-address inputs sequentially select and route associated input data to the appropriate output of each section. The individual strobes permit activating or inhibiting each of the 4-bit sections as desired. Data applied to input 1C is inverted through its outputs. The inverter following the 1C data input permits use as a 3-to-8-line decoder or 1-to-8-line demultiplexer without external gating. Features Ordering Information Part Name P Package Type DILP-16 pin Package Code (Previous Code) PRDP0016E- (DP-16FV) Note: Please consult the sales office for the above package availability. Package bbreviation P Taping bbreviation (Quantity) Pin rrangement Data 1C 1 16 V CC Strobe 1G 2 15 Data 2C Select Input 3 14 Strobe 2G 1Y1 GND Y1 1G 1C 2G 2Y3 2C 2Y2 2Y Y0 9 Select Input 2Y3 2Y2 2Y1 2Y0 (Top view) Rev.2.00, Feb , page 1 of 6

2 Function Table 2-line-to-4-line Decoder / 1-line-to-4-line Demultiplexer Inputs Select Strobe Data 1G 1C 1Y 0 1Y 1 1Y 2 1Y 3 X X H X H H H H L L L H L H H H L H L H H L H H H L L H H H L H H H L H H H H L X X X L H H H H Inputs Select Strobe Data 2G 2C 2Y 0 2Y 1 2Y 2 2Y 3 X X H X H H H H L L L L L H H H L H L L H L H H H L L L H H L H H H L L H H H L X X X H H H H H 3-line-to-8-line Decoder / 1-line-to-8-line Demultiplexer Select Inputs Strobe Data C G 2Y 0 2Y 1 2Y 2 2Y 3 1Y 0 1Y 1 1Y 2 1Y 3 X X X H H H H H H H H H L L L L L H H H H H H H L L H L H L H H H H H H L H L L H H L H H H H H L H H L H H H L H H H H H L L L H H H H L H H H H L H L H H H H H L H H H H L L H H H H H H L H H H H L H H H H H H H L Notes: 1. C ; input 1C and 2C connected together 2. G ; inputs 1G and 2G connected together 3. H ; high level, L ; low level, X ; irrelevant Rev.2.00, Feb , page 2 of 6

3 lock Diagram Strobe 1G Data 1C Select Select Data 2C Strobe 2G 1Y1 2Y0 2Y1 2Y2 2Y3 bsolute Maximum Ratings Item Symbol Ratings Unit Supply voltage V CC 7 V Input voltage V IN 7 V Power dissipation P T 400 mw Storage temperature Tstg 65 to +150 C Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Recommended Operating Conditions Item Symbol Min Typ Max Unit Supply voltage V CC V current I OH 400 µ I OL 8 m Operating temperature Topr C Electrical Characteristics Input voltage voltage Input current Item Symbol min. typ.* max. Unit Condition Short-circuit output current V IH 2.0 V V IL 0.8 V V OH 2.7 V (Ta = 20 to +75 C) V CC = 4.75 V, V IH = 2 V, V IL = 0.8 V, I OH = 400 µ 0.4 I OL = 4 m V CC = 4.75 V, V IH = 2 V, V 0.5 I OL = 8 m V IL = 0.8 V I IH 20 µ V CC = 5.25 V, V I = 2.7 V V OL I IL 0.4 m V CC = 5.25 V, V I = 0.4 V I I 0.1 m V CC = 5.25 V, V I = 7 V I OS 5 42 m V CC = 5.25 V Supply current** I CC m V CC = 5.25 V Input clamp voltage V IK 1.5 V V CC = 4.75 V, I IN = 18 m Notes: * V CC = 5 V, Ta = 25 C ** I CC is measured with outputs open,,, and 1C inputs at 4.5 V, and 2C, 1G, and 2G inputs grounded. Rev.2.00, Feb , page 3 of 6

4 Switching Characteristics Item Symbol Inputs Propagation delay time Levels of logic (V CC = 5 V, Ta = 25 C) min. typ. max. Unit Condition t PLH,, 2C ns Y 2 1G or 2G ns t PLH ns or Y ns t PLH ns 1C Y ns Testing Method Test Circuit C L = 15 pf, R L = 2 kω V CC 4.5V RL Load circuit 1 CL Input 1G P.G. Zout = 50Ω See Testing Table 1C 2C 2G 1Y1 2Y0 2Y1 2Y2 2Y3 Notes: 1. C L includes probe and jig capacitance. 2. ll diodes are 1S2074(H). Rev.2.00, Feb , page 4 of 6

5 Waveform t TLH t THL Input 10% 90% 1.3 V t PLH 90% 1.3 V 10% 3 V 0 V V OH In phase output 1.3 V 1.3 V V OL t PLH Out of phase output 1.3 V 1.3 V V OH V OL Note: Input pulse; t TLH 15 ns, t THL 6 ns, PRR = 1 MHz, duty cycle 50% Rev.2.00, Feb , page 5 of 6

6 1 Package Dimensions JEIT Package Code P-DIP16-6.3x RENESS Code PRDP0016E- Previous Code DP-16FV MSS[Typ.] 1.05g D b 3 E Z L Reference Symbol e 1 D E Dimension in Millimeters Min Nom Max e b p θ c b p b e 1 c θ e ( Ni/Pd/u plating ) Z L Rev.2.00, Feb , page 6 of 6

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