HD74HC125/HD74HC126 Quad. Bus Buffer Gates (with 3-state outputs) Description The HD74HC125, HD74HC126 require the 3-state control input C to be taken high to put the output into the high impedance condition, whereas the HD74HC125, HD74HC126 requires the control input to be low to put the output into high impedance. Features • • • • • High Speed Operation: tpd = 8 ns typ (CL = 50 pF) 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) Function Table Inputs C Output Y HC125 HC126 A HC125 HC126 H L X Z Z L H L L L L H H H H X : Z : Irrelevent Off (high-impedance) state of a 3-state output. HD74HC125/HD74HC126 Pin Arrangement HD74HC125 1C 1 14 VCC 1A 2 13 4C 1Y 3 12 4A 2C 4 11 4Y 2A 5 10 3C 2Y 6 9 3A GND 7 8 3Y (Top view) HD74HC126 1C 1 14 VCC 1A 2 13 4C 1Y 3 12 4A 2C 4 11 4Y 2A 5 10 3C 2Y 6 9 3A GND 7 8 3Y (Top view) 2 HD74HC125/HD74HC126 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 temperautre Tstg –65 to +150 °C 3 HD74HC125/HD74HC126 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 4 — HD74HC125/HD74HC126 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 — — 100 — 125 ns time 4.5 — 8 20 — 25 6.0 — — 17 — 21 Item Symbol t PHL Output enable t ZH 2.0 — — 150 — 190 time t ZL 4.5 — 9 30 — 38 6.0 — — 26 — 33 Output disable t HZ 2.0 — — 150 — 190 time t LZ 4.5 — 14 30 — 38 6.0 — — 26 — 33 Output rise/fall t TLH 2.0 — — 60 — 75 time t THL 4.5 — 4 12 — 15 6.0 — — 10 — 13 — — 5 10 — 10 Input capacitance Cin Test Conditions ns ns ns pF 5 Cautions 1. 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However, contact Hitachi’s sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. 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Unit: mm 19.20 20.32 Max 8 6.30 7.40 Max 14 1.30 7 2.54 ± 0.25 0.48 ± 0.10 0.51 Min 2.39 Max 2.54 Min 5.06 Max 1 7.62 + 0.10 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Weight (reference value) DP-14 Conforms Conforms 0.97 g Unit: mm 10.06 10.5 Max 8 5.5 14 1 0.10 ± 0.10 1.42 Max 1.27 *0.42 ± 0.08 0.40 ± 0.06 *0.22 ± 0.05 0.20 ± 0.04 2.20 Max 7 + 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-14DA — Conforms 0.23 g Unit: mm 8.65 9.05 Max 8 1 7 *0.20 ± 0.05 0.635 Max 1.75 Max 3.95 14 + 0.10 6.10 – 0.30 1.08 *0.40 ± 0.06 0.11 0.14 +– 0.04 0° – 8° 1.27 0.67 0.60 +– 0.20 0.15 0.25 M *Pd plating Hitachi Code JEDEC EIAJ Weight (reference value) FP-14DN Conforms Conforms 0.13 g Unit: mm 4.40 5.00 5.30 Max 14 8 1 7 0.65 0.20 ± 0.06 1.0 0.13 M 6.40 ± 0.20 0.10 *Dimension including the plating thickness Base material dimension *0.17 ± 0.05 0.15 ± 0.04 1.10 Max 0.83 Max 0.07 +0.03 –0.04 *0.22+0.08 –0.07 0° – 8° 0.50 ± 0.10 Hitachi Code JEDEC EIAJ Weight (reference value) TTP-14D — — 0.05 g