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MC74HC299 Datasheet(PDF) 1 Page - Motorola, Inc |
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MC74HC299 Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 8 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA 3–1 REV 6 © Motorola, Inc. 1995 10/95 8-Bit Bidirectional Universal Shift Register with Parallel I/O High–Performance Silicon–Gate CMOS The MC74HC299 is identical in pinout to the LS299. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC299 features a multiplexed parallel input/output data port to achieve full 8–bit handling in a 20 pin package. Due to the large output drive capability and the 3–state feature, this device is ideally suited for interface with bus lines in a bus–oriented system. Two Mode–Select inputs and two Output Enable inputs are used to choose the mode of operation as listed in the Function Table. Synchronous parallel loading is accomplished by taking both Mode–Select lines, S1 and S2, high. This places the outputs in the high–impedance state, which permits data applied to the data port to be clocked into the register. Reading out of the register can be accomplished when the outputs are enabled. The active–low asynchronous Reset overrides all other inputs. • Output Drive Capability: 15 LSTTL Loads for QA through QH 10 LSTTL Loads for QA′ and QH′ • Outputs Directly Interface to CMOS, NMOS, and TTL • Operating Voltage Range: 2 to 6 V • Low Input Current: 1 µA • High Noise Immunity Characteristic of CMOS Devices • In Compliance with the Requirements Defined by JEDEC Standard No. 7A • Chip Complexity: 398 FETs or 99.5 Equivalent Gates LOGIC DIAGRAM 7 13 6 14 5 15 4 16 8 17 11 18 12 9 1 19 2 3 PG/QG PE/QE PC/QC PA/QA QA ′ QH ′ PH/QH PF/QF PD/QD PB/QB SERIAL DATA INPUTS SA (SHIFT RIGHT) SH (SHIFT LEFT) RESET S1 S2 OE1 OE2 MODE SELECT OUTPUT ENABLES CLOCK 3–STATE PARALLEL DATA PORT (INPUTS/OUTPUTS) SERIAL DATA OUTPUTS PIN 20 = VCC PIN 10 = GND MC74HC299 PIN ASSIGNMENT PC/QC PG/QG OE2 OE1 S1 GND RESET QA′ PA/QA PE/QE 5 4 3 2 1 10 9 8 7 6 14 15 16 17 18 19 20 11 12 13 PH/QH QH′ SH S2 VCC SA CLOCK PB/QB PD/QD PF/QF DW SUFFIX SOIC PACKAGE CASE 751D–04 N SUFFIX PLASTIC PACKAGE CASE 738–03 ORDERING INFORMATION MC74HCXXXN MC74HCXXXDW Plastic SOIC 1 20 1 20 |
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