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74HC191 - 4-BIT SYNCHRONOUS UP/DOWN COUNTERS

Download the 74HC191 datasheet PDF. This datasheet also covers the 74HC190 variant, as both devices belong to the same 4-bit synchronous up/down counters family and are provided as variant models within a single manufacturer datasheet.

General Description

The M54/74HC190/191 are high speed CMOS 4-BIT SYNCHRONOUS UP/DOWN COUNTERS fabricated in silicon gate C2MOS technology.

They have the same high speed performance of LSTTL combined with true CMOS low power consumption.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (74HC190-STMicroelectronics.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
74HC191 4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS Texas Instruments
74HC191 Synchronous Binary Up/Down Counters National Semiconductor
74HC191 Presettable synchronous 4-bit binary up/down counter NXP
74HC191 Presettable synchronous 4-bit binary up/down counter nexperia
74HC191D Presettable synchronous 4-bit binary up/down counter nexperia

Other Datasheets by STMicroelectronics

Part Number Description
74HC190 4-BIT SYNCHRONOUS UP/DOWN COUNTERS
74HC148 8 TO 3 LINE PRIORITY ENCODER
74HC155 DUAL 2 TO 4 LINE DECODER 3 TO 8 LINE DECODER
74HC157 QUAD 2 CHANNEL MULTIPLEXER
74HC05 HEX INVERTER

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
M54/M74HC190 M54/M74HC191 4 BIT SYNCHRONOUS UP/DOWN COUNTERS . HIGH SPEED fMAX = 48 MHz (TYP.) AT VCC = 5 V . LOW POWER DISSIPATION ICC = 4 µA (MAX.) AT TA = 25 °C . HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) . OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS . SYMMETRICAL OUTPUT IMPEDANCE IOH = IOL = 4 mA (MIN.) . BALANCED PROPAGATION DELAYS tPLH = tPHL . WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V . PIN AND FUNCTION COMPATIBLE WITH 54/74LS190/191 B1R (Plastic Package) F1R (Ceramic Package) M 1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HCXXXF1R M74HCXXXM1R M74HCXXXB1R M74HCXXXC1R PIN CONNECTIONS (top view) DESCRIPTION The M54/74HC190/191 are high speed CMOS 4-BIT SYNCHRONOUS UP/DOWN COUNTERS fabricated in silicon gate C2MOS technology.