HD74HC165 Parallel-load 8-bit Shift Register Description This 8-bit serial shift register shifts data from QA to QH when clocked. Parallel inputs to each stage are enabled by a low level at the Shift/Load input. Also included is a gated clock input and a complementary output from the eighth bit. Clocking is accomplished through a 2-input NOR gate permitting one input to be used as a clock inhibit function. Holding either of the clock inputs high inhibits clocking, and holding either clock input low with the Shift/Load input high enables the other clock input. Data transfer occurs on the positive going edge of the clock. Parallel loading is inhibited as long as the Shift/Load input is high. When taken low, data at the parallel inputs is loaded directly into the register independent of the state of the clock. Features • • • • • High Speed Operation: tpd (Clock to QH) = 21 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 Shift/Load Clock Inhibit Clock Serial A ······ H QA QB QH L X X X a ······h a b h H L L X X QA0 QB0 QH0 H L H X H QAn QGn H L L X L QAn QGn H H X X QA0 QB0 QH0 X HD74HC165 Pin Arrangement Shift/ Load Clock 2 Parallel Inputs 16 VCC 1 Clock 15 Inhibit CK E 3 E D 14 D F 4 F C 13 C G 5 G B 12 B H 6 H A 11 A QH 7 QH Parallel Inputs 10 Serial-In QH 9 QH GND 8 (Top view) Timing Diagram Clock Clock Inhibit Serial Input Shift/Load Data A B H L C D H L E F H L G H H H Output QH H H L H L H L H Output QH L L H L H L H L Inhibit Load 2 Serial Shift HD74HC165 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 — 3 HD74HC165 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 — — 27 — 21 6.0 — — 32 — 25 Propagation delay t PLH 2.0 — — 150 — 190 time 4.5 — 21 30 — 38 6.0 — — 26 — 33 2.0 — — 160 — 200 4.5 — 23 32 — 40 6.0 — — 27 — 34 2.0 — — 150 — 190 4.5 — 21 30 — 38 6.0 — — 26 — 33 2.0 100 — — 125 — 4.5 20 –3 — 25 — 6.0 17 — — 21 — 2.0 100 — — 125 — 4.5 20 3 — 25 — 6.0 17 — — 21 — 2.0 100 — — 125 — 4.5 20 — — 25 — 6.0 17 — — 21 — 2.0 100 — — 125 — 4.5 20 6 — 25 — 6.0 17 — — 21 — 2.0 5 — — 5 — 4.5 5 –3 — 5 — 6.0 5 — — 5 — 2.0 5 — — 5 — 4.5 5 3 — 5 — 6.0 5 — — 5 — 2.0 5 — — 5 — 4.5 5 — — 5 — 6.0 5 — — 5 — frequency Setup time Removal time Hold time 4 t PHL t su t rem th ns Test Conditions Clock to QH or QH Shift/Load to QH or QH H to QH or QH ns Parallel data inputs to Shift/Load Sherial input to Clock Shift/load to Clock ns Clock to Clock inhibit or Clock inhibit to Clock ns Shift/Load to parallel data input Clock to Serial data input Clock to Shift/Load HD74HC165 AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) (cont) Ta = –40 to +85°C Ta = 25°C Item Symbol VCC (V) Min Typ Max Min Max Unit Test Conditions Pulse width tw 2.0 80 — — 100 — ns Clock, Shift/Load 4.5 16 6 — 20 — 6.0 14 — — 17 — 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 ns pF 5 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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