HD74HC166 Parallel-load 8-bit Shift Register Description This device is an 8-bit shift register with an output from the last stage. Data may be loaded into the register either in parallel or in serial form. When the Shift/Load input is low, the data is loaded asynchronously in parallel. When the Shift/Load input is high, the data is loaded serially on the rising edge of either clock inhibit or Clock. Clear is asynchronous and active-low. The 2-input NOR clock may be used either by combining two independent clock sources or by designating one of the clock inputs to act as a clock inhibit. Features • • • • • High Speed Operation: tpd (Clock to QH) = 14 ns typ (CL = 50 pF) High Output Current: Fanout of 10 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 Parallel Internal Outputs Output Clear Shift/Load Clock Inhibit Clock Serial A ··· H QA QB QH L X X X X X L L L H X L L X X QA0 QB0 QH0 H L L X a ··· h a b h H H L H X H QAn QGn H H L L X L QAn QGn H X H X X QA0 QB0 QH0 HD74HC166 Pin Arrangement Serial 1 Input 16 VCC A 2 15 Shift/Load B 3 Parallel 14 Input H C 4 13 Output QH D 5 12 G Clock Inhibit 6 11 F Clock 7 10 E GND 8 9 Clear Parallel Inputs (Top view) 2 Parallel Inputs HD74HC166 Logic Diagram Clear Clock Clock Inhibit Shift/ Load Serial Input D CK CK Q CLK D CK CK Q CLK D CK CK Q CLK D CK CK Q CLK D CK CK Q CLK D CK CK Q CLK D CK CK Q CLK D CK CK Q CLK A B C D E F G H QH 3 HD74HC166 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 = –4 mA 6.0 5.68 — — 5.63 — I OH = –5.2 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 = 4 mA 6.0 — — 0.26 — 0.33 I OL = 5.2 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 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 — HD74HC166 AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Ta = –40 to +85°C Ta = 25°C Item Symbol VCC (V) Min Typ Max Min Max Unit Maximum clock f max 2.0 — — 5 — 4 MHz 4.5 — — 25 — 20 6.0 — — 29 — 24 Propagation delay t PHL 2.0 — — 175 — 220 time 4.5 — 14 35 — 44 6.0 — — 30 — 37 2.0 — — 150 — 190 4.5 — 12 30 — 38 6.0 — — 26 — 33 2.0 150 — — 190 — 4.5 30 2 — 38 — 6.0 26 — — 33 — 2.0 100 — — 125 — 4.5 20 1 — 25 — 6.0 17 — — 21 — 2.0 5 — — 5 — 4.5 5 0 — 5 — 6.0 5 — — 5 — 2.0 80 — — 100 — 4.5 16 6 — 20 — 6.0 14 — — 17 — frequency t PLH t PHL Setup time Hold time Pulse width t su th tw Output rise/fall t TLH 2.0 — — 75 — 95 time t THL 4.5 — 5 15 — 19 6.0 — — 13 — 16 — — 5 10 — 10 Input capacitance Cin Test Conditions ns Clock to QH ns Clear to QH ns Shift/Load to Clock ns Data to Clock ns Clock to Data ns Clock, Clear ns pF 5 HD74HC166 Timing Diagram Clock Clock Inhibit Clear Serial Input Shift/Load Parallel Inputs A H B L C H D L E H F L G H H H H Output QH Serial Shift Clear 6 Inhibit Load H L H L H Serial Shift L H L Unit: mm 19.20 20.00 Max 1 7.40 Max 9 6.30 16 8 1.3 0.48 ± 0.10 2.54 Min 5.06 Max 2.54 ± 0.25 0.51 Min 1.11 Max 7.62 + 0.13 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Weight (reference value) DP-16 Conforms Conforms 1.07 g Unit: mm 10.06 10.5 Max 9 1 8 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 16 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-16DA — Conforms 0.24 g Unit: mm 9.9 10.3 Max 9 1 8 0.635 Max *0.42 ± 0.08 0.40 ± 0.06 0.15 *0.22 ± 0.03 0.20 ± 0.03 1.27 0.11 0.14 +– 0.04 1.75 Max 3.95 16 0.10 6.10 +– 0.30 1.08 0° – 8° 0.67 0.60 +– 0.20 0.25 M *Dimension including the plating thickness Base material dimension Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DN Conforms Conforms 0.15 g Cautions 1. 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