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54LS290 - 4-BIT BINARY COUNTER

Download the 54LS290 datasheet PDF. This datasheet also covers the 54LS293 variant, as both devices belong to the same 4-bit binary counter family and are provided as variant models within a single manufacturer datasheet.

General Description

The LS290 and LS293 are 4-bit ripple type Decade, and 4-Bit Binary counters respectively.

Each device consists of four master / slave flip-flops which are internally connected to provide a divide-by-two section and a divide-by-five (LS290) or divide-by-eight (LS293) section.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (54LS293-Motorola.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
54LS295 LSTTL Type 4-Bit Bidirectional Universal Shift Register TW
54LS20 Dual 4-Input NAND Gates National Semiconductor
54LS21 Dual 4-Input AND Gates National Semiconductor
54LS22 Dual 4-Input NAND Gates National Semiconductor
54LS240 LSTTL eight-Buffer / Bus Driver BDTIC

Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
54LS293 4-BIT BINARY COUNTER
54LS21 DUAL 4-INPUT AND GATE
54LS22 DUAL 4-INPUT NAND GATE
54LS256 DUAL 4-BIT ADDRESSABLE LATCH
54LS257B QUAD 2-INPUT MULTIPLEXER

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
DECADE COUNTER; 4-BIT BINARY COUNTER The SN54 / 74LS290 and SN54 / 74LS293 are high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two section and either a divide-by-five (LS290) or divide-by-eight (LS293) section which are triggered by a HIGH-to-LOW transition on the clock inputs. Each section can be used separately or tied together (Q to CP)to form BCD, Bi-quinary, or Modulo-16 counters. Both of the counters have a 2-input gated Master Reset (Clear), and the LS290 also has a 2-input gated Master Set (Preset 9). • Corner Power Pin Versions of the LS90 and LS93 • Low Power Consumption . . . Typically 45 mW • High Count Rates . . . Typically 42 MHz • Choice of Counting Modes . . .