HD74HC299 8-bit Universal Shift/Storage Register (with 3-state outputs) Description The HD74HC299 features multiplexed inputs/outputs to achieve full 8-bit data handling in a single 20-pin package. Due to the large output drive capability and 3-state feature, this device is ideally suited for interfacing with bus lines in a bus oriented system. Two function select inputs and two output control inputs are used to choose the mode of operation as listed in the function table. Synchronous parallel loading is accomplished by taking both function select lines S0 and S 1 high. This places the 3-state outputs in a high impedance state, which permits data applied to the input/output lines to be clocked into the register. Reading out of the register can be done while the outputs are enabled in any mode. A direct overriding clear input is provided to clear the register whether the outputs are enabled or disabled. 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) HD74HC299 Function Table Inputs Function Select Output Control Serial Inputs/Outputs Outputs Mode Clear S1 S0 G1† G2† Clock SL SR A/QA B/QB C/QC D/QD E/QE F/QF G/Q G H/QH QA’ QH’ Clear L X L L L X X X L L L L L L L L L L L L X L L X X X L L L L L L L L L L H L L L L X X X QA0 QB0 QC0 QD0 QE0 QF0 QG0 QH0 QA0 QH0 H X X L L L X X QA0 QB0 QC0 QD0 QE0 QF0 QG0 QH0 QA0 QH0 Shift H L H L L X H H QAn QBn QCn QDn QEn QFn QGn H QGn Right H L H L L X L L QAn QBn QCn QDn QEn QFn QGn L QGn Shift H H L L L H X QBn QCn QDn QEn QFn QGn QHn H QBn H Left H H L L L L X QBn QCn QDn QEn QFn QGn QHn L QBn L Load H H H X X X X a b c d e f g h a h Hold Notes: 1. a to h; the level of steady-state input at inputs A through H, respectively. These data are loaded into the flip-flop outputs are isolated from the input/output terminals. 2. QA0 to Q H0; the level of QA through QH , respectively, before the indicated steady-state input conditions were established. 3. QAn to Q Hn; the level of QA through QH , respectively, before the most-recent transition of the clock. 4. † = ; When one or both output controls are high the eight input/output terminals are desabled to the high-impedance state, however, sequential operation or clearing of the register is not affected. 5. When clear is low, outputs of Q A’ and QH’ are low, in spite of other inputs. 2 HD74HC299 Pin Arrangement S0 Output controls G1 1 20 VCC S0 2 S1 19 S1 SL 18 17 QH G Shift left SL G2 3 G/QC 4 G/QG QH E/QE 5 E/QE H/QH 16 H/QH C/QC 6 C/QC F/QF 15 F/QF A/QA 7 A/QA D/QD 14 D/QD QA 8 QA B/QB 13 B/QB Clear 9 Clear SR CK 12 Clock 11 Shift right SR GND 10 (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 HD74HC299 Block Diagram Sift right serial-input S1 Sift left serial-input S0 D Clear D D D D D D D Q Q Q Q Q Q Q Q C C CLR C C CLR C C CLR C C CLR C C CLR C C CLR C C CLR C C CLR Clock G2 G1 QA 4 A QA B QB C QC D QD E QE F QF G QG QH H QH HD74HC299 DC Characteristics Ta = –40 to +85°C Ta = 25°C Item Symbol VCC (V) Min Typ Max Min Max Unit Test Conditions 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 6.0 5.68 — — 4.5 4.18 — 6.0 5.68 — 2.0 — 4.5 VIL Output voltage VOH VOL V Vin = VIH or VIL I OH = –20 µA — QA’ & QH’ I OH = –4 mA 5.63 — Outputs I OH = –5.2 mA — 4.13 — A/Q A thru I OH = –6 mA — 5.63 — H/QH Outputs I OH = –7.8 mA 0.0 0.1 — 0.1 — 0.0 0.1 — 0.1 6.0 — 0.0 0.1 — 0.1 4.5 — — 0.26 — 6.0 — — 4.5 — 6.0 V Vin = VIH or VIL I OL = 20 µA 0.33 QA’ & QH’ I OH = 4 mA 0.26 — 0.33 Outputs I OH = 5.2 mA — 0.26 — 0.33 A/Q A thru I OH = 6 mA — — 0.26 — 0.33 H/QH Outputs I OH = 7.8 mA V 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 — 5 HD74HC299 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 — 23 Propagation delay t PLH 2.0 — — 190 — 240 time 4.5 — — 38 — 48 6.0 — — 32 — 41 2.0 — — 220 — 275 4.5 — — 44 — 55 6.0 — — 37 — 47 t PLH 2.0 — — 190 — 240 t PHL 4.5 — — 38 — 48 6.0 — — 32 — 41 2.0 — — 220 — 275 4.5 — — 44 — 55 6.0 — — 37 — 47 frequency t PHL t PHL t PHL Output enable t ZH 2.0 — — 160 — 200 time t ZL 4.5 — — 32 — 40 6.0 — — 27 — 34 Output disable t HZ 2.0 — — 160 — 200 time t LZ 4.5 — — 32 — 40 6.0 — — 27 — 34 2.0 100 — — 125 — 4.5 20 — — 25 — 6.0 17 — — 21 — 2.0 5 — — 5 — 4.5 5 — — 5 — 6.0 5 — — 5 — 2.0 50 — — 65 — 4.5 10 — — 13 — 6.0 9 — — 11 — 2.0 80 — — 100 — 4.5 16 — — 20 — 6.0 14 — — 17 — Setup time Hold time Removal time Pulse width 6 t su th t rem tw Test Conditions ns Clock to QA’ or QH ’ ns Clear to QA’ or QH ’ ns Clock to QA – QH ns Clear to QA – QH ns ns ns Select ns Select ns Clear ns HD74HC299 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 Output rise/fall t TLH 2.0 — — 60 — 75 ns A/Q A thru H/QH outputs time t THL 4.5 — — 12 — 15 6.0 — — 10 — 13 2.0 — — 75 — 95 ns QA’ & QH’ outputs 4.5 — — 15 — 19 6.0 — — 13 — 16 — — 5 10 — 10 Input capacitance Cin pF 7 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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