HD74HC442/HD74HC443/HC74HC444 Quad. Tridirectional Bus Transceiver (with noninverted 3-state outputs) Quad. Tridirectional Bus Transceiver (with inverted 3-state outputs) Quad Tridirectional Bus Transceiver (with noninverted/inverted 3-state outputs) Description These bus transceivers are designed for a synchronous three-way communication between four-line data buses. They give the designer a choice of selecting inverting, noninverting or a combination of inverting and noninverting data paths with 3-state outputs. The S 0 and S1 inputs select the bus from which data are to be transferred. The G inputs enable the bus or buses to which data are to be transferred. The port for any bus selected for input and any other bus not enabled for output will be at high impedance. Features • • • • • High Speed Operation High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) HD74HC442/HD74HC443HD74HC444 Function Table Inputs Transfers Between Buses CS S1 S0 GA GB GC HD74HC442 HD74HC443 HD74HC444 H X X X X X None None None X H H X X X None None None X X X H H H None None None X L L X H H None None None X L H H X H None None None X H L H H X None None None L L L X L L A → B, A → C A → B, A → C A → B, A → C L L H L X L B → C, B → A B → C, B → A B → C, B → A L H L L L X C → A, C → B C → A, C → B C → A, C → B L L L X L H A→B A→B A→B L L H H X L B→C B→C B→C L H L L H X C→A C→A C→A L L L X H L A→C A→C A→C L L H L X H B→A B→A B→A L H L H L X C→B C→B C→B 2 HD74HC442/HD74HC443/HD74HC444 Pin Arrangement CS 1 20 VCC B1 2 19 GC C1 3 18 GB C2 4 17 GA B2 5 16 A1 B3 6 15 A2 C3 7 14 A3 C4 8 13 A4 B4 9 12 S1 GND 10 11 S0 (Top view) Absolute Maximum Ratings Item Symbol Rating Unit Supply voltage range VCC –0.5 to +7.0 V Input voltage VIN –0.5 to VCC + 0.5 V Output voltage VOUT –0.5 to VCC + 0.5 V Output current I OUT ±35 mA DC current drain per VCC GND I CC, I GND ±75 mA DC input diode current I IK ±20 mA DC output diode current I OK ±20 mA Power Dissipation per package PT 500 mW Storage temperature Tstg –65 to +150 °C 3 HD74HC442/HD74HC443HD74HC444 Logic Diagram HD74HC442 S0 A1 B1 C1 A2 B2 C2 A3 B3 C3 A4 B4 C4 4 S1 GA GH GC CS HD74HC442/HD74HC443/HD74HC444 HD74HC443 S0 S1 GA GH GC CS A1 B1 C1 A2 B2 C2 A3 B3 C3 A4 B4 C4 5 HD74HC442/HD74HC443HD74HC444 HD74HC444 S0 A1 B1 C1 A2 B2 C2 A3 B3 C3 A4 B4 C4 6 S1 GA GH GC CS HD74HC442/HD74HC443/HD74HC444 DC Characteristics Ta = –40 to +85°C Ta = 25°C Item Symbol VCC (V) Min Typ Max Min Max Unit Input voltage VIH 2.0 1.5 — — 1.5 — V 4.5 3.15 — — 3.15 — 6.0 4.2 — — 4.2 — 2.0 — — 0.5 — 0.5 4.5 — — 1.35 — 1.35 6.0 — — 1.8 — 1.8 2.0 1.9 2.0 — 1.9 — 4.5 4.4 4.5 — 4.4 — 6.0 5.9 6.0 — 5.9 — 4.5 4.18 — — 4.13 — I OH = –6 mA 6.0 5.68 — — 5.63 — I OH = –7.8 mA 2.0 — 0.0 0.1 — 0.1 4.5 — 0.0 0.1 — 0.1 6.0 — 0.0 0.1 — 0.1 4.5 — — 0.26 — 0.33 I OL = 6 mA 6.0 — — 0.26 — 0.33 I OL = 7.8 mA VIL Output voltage VOH VOL Test Conditions V V V Vin = VIH or VIL I OH = –20 µA Vin = VIH or VIL I OL = 20 µA Off-state output current I OZ 6.0 — — ±0.5 — ±5.0 µA Vin = VIH or VIL, Vout = VCC or GND Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND Quiescent supply current I CC 6.0 — — 4.0 40 µA Vin = VCC or GND, Iout = 0 µA — 7 HD74HC442/HD74HC443HD74HC444 AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Ta = –40 to +85°C Ta = 25°C VCC (V) Min Typ Max Min Max Unit Propagation delay t PLH 2.0 — — 200 — 250 ns time 4.5 — — 40 — 50 6.0 — — 34 — 43 Item Symbol t PHL Output enable t ZH 2.0 — — 150 — 190 time t ZL 4.5 — — 30 — 38 6.0 — — 26 — 33 Output disable t HZ 2.0 — — 150 — 190 time t LZ 4.5 — — 30 — 38 6.0 — — 26 — 33 Output rise/fall t TLH 2.0 — — 60 — 75 time t THL 4.5 — — 12 — 15 6.0 — — 10 — 13 — — 5 10 — 10 Input capacitance 8 Cin ns ns ns pF Test Conditions Unit: mm 24.50 25.40 Max 6.30 11 1 7.00 Max 20 10 1.30 2.54 ± 0.25 0.48 ± 0.10 0.51 Min 1.27 Max 2.54 Min 5.08 Max 0.89 7.62 + 0.11 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Weight (reference value) DP-20N — Conforms 1.26 g Unit: mm 12.6 13 Max 11 1 10 1.27 *0.42 ± 0.08 0.40 ± 0.06 0.10 ± 0.10 0.80 Max *0.22 ± 0.05 0.20 ± 0.04 2.20 Max 5.5 20 0.20 7.80 +– 0.30 1.15 0° – 8° 0.70 ± 0.20 0.15 0.12 M *Dimension including the plating thickness Base material dimension Hitachi Code JEDEC EIAJ Weight (reference value) FP-20DA — Conforms 0.31 g Unit: mm 12.8 13.2 Max 11 1 10 0.20 ± 0.10 0.935 Max 1.27 *0.42 ± 0.08 0.40 ± 0.06 *0.27 ± 0.05 0.25 ± 0.04 2.65 Max 7.50 20 0.25 10.40 +– 0.40 1.45 0° – 8° 0.57 0.70 +– 0.30 0.15 0.12 M *Dimension including the plating thickness Base material dimension Hitachi Code JEDEC EIAJ Weight (reference value) FP-20DB Conforms — 0.52 g Cautions 1. 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