SN74LS190N

Accurate and robust counter solution for a wide range of applications
4,412 有效庫存

SN74LS190N

有效庫存4,412

Accurate and robust counter solution for a wide range of applications

  • 製造商零件號 # : SN74LS190N

  • 包裝/封裝: PDIP-16

  • 零件狀態 : OBSOLETE

  • 製造商: Texas Instruments

  • 產品分類 : Counters, Dividers

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SN74LS190N 數據表
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詳細說明

PRESETTABLE BCD/DECADE UP/DOWN COUNTERSPRESETTABLE 4-BIT BINARY UP/DOWN COUNTERSThe SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and the SN54/74LS191 is a synchronous UP/DOWN Modulo-16 Binary Counter. State changes of the counters are synchronous with the LOW-to-HIGH transition of the Clock Pulse input.An asynchronous Parallel Load (PL) input overrides counting and loads the data present on the Pn inputs into the flip-flops, which makes it possible to use the circuits as programmable counters. A Count Enable (CE) input serves as the carry /borrow input in multi-stage counters. An Up/Down Count Control (U/D) input determines whether a circuit counts up or down. A Terminal Count (TC) output and a Ripple Clock (RC) output provide overflow/underflow indication and make possible a variety of methods for generating carry/borrow signals in multistage counter applications.• Low Power . . . 90 mW Typical Dissipation• High Speed . . . 25 MHz Typical Count Frequency• Synchronous Counting• Asynchronous Parallel Load• Individual Preset Inputs• Count Enable and Up/Down Control Inputs• Cascadable• Input Clamp Diodes Limit High Speed Termination Effects

SN74LS190N

主要特徵

  • The SN74LS190N has a high-speed operation, making it suitable for many applications
  • It includes an internal ripple-carry logic circuit for accurate counting
  • A down/up mode control allows for bidirectional counting operations
  • The counter can be cleared quickly with the CLEAR input
  • This device is ideal for use in data processing and transmission systems
  • The synchronous design ensures reliable counting and clear operations

應用

  • Time delay
  • Event counter
  • Sequence generator

規格

以下是所選零件的基本參數，涉及零件的特性及其所屬類別。

Pbfree Code No Rohs Code No
Part Life Cycle Code Obsolete Part Package Code DIP
Pin Count ! 16 Reach Compliance Code not_compliant
HTS Code ! 8542.39.00.01 Additional Feature ! TCO OUTPUT
Count Direction BIDIRECTIONAL Family LS
JESD-30 Code R-PDIP-T16 Length 19.305 mm
Load Capacitance (CL) 15 pF Load/Preset Input YES
Logic IC Type DECADE COUNTER Max Frequency@Nom-Sup 20000000 Hz
Max I(ol) 0.008 A Mode of Operation ! SYNCHRONOUS
Number of Bits 4 Number of Functions 1
Number of Terminals 16 Operating Temperature-Max 70 °C
Operating Temperature-Min Package Body Material PLASTIC/EPOXY
Package Code DIP Package Equivalence Code DIP16,.3
Package Shape RECTANGULAR Package Style IN-LINE
Peak Reflow Temperature (Cel) NOT SPECIFIED Power Supplies ! 5 V
Power Supply Current-Max (ICC) 35 mA Propagation Delay (tpd) 36 ns
Qualification Status ! Not Qualified Seated Height-Max 5.08 mm
Supply Voltage-Max (Vsup) 5.25 V Supply Voltage-Min (Vsup) 4.75 V
Supply Voltage-Nom (Vsup) 5 V Surface Mount ! NO
Technology TTL Temperature Grade ! COMMERCIAL
Terminal Form ! THROUGH-HOLE Terminal Pitch ! 2.54 mm
Terminal Position DUAL Time@Peak Reflow Temperature-Max (s) NOT SPECIFIED
Trigger Type POSITIVE EDGE Width 7.62 mm
fmax-Min 20 MHz Product Category ! Counter ICs
Mounting Style Through Hole Package / Case PDIP-16
Counter Type Binary Logic Family 74LS
Counting Method Synchronous Counting Sequence Up/Down
Operating Supply Voltage ! 4.75 V to 5.25 V Minimum Operating Temperature 0 C
Maximum Operating Temperature ! + 70 C Series SN74LS190
Brand Texas Instruments Operating Temperature Range ! 0 C to + 70 C
Product Type ! Counter ICs Subcategory Counter ICs
Unit Weight 0.057419 oz

數據表 PDF

數據表記錄了器件的特性、絕對最大額定值、應用等，這對於作為器件特定應用的整體指南大有裨益。

初步規格 SN74LS190N PDF 下載

常見問題解答

What is SN74LS190N?

The SN74LS190N is a synchronous, up/down, 4-bit binary counter designed by Texas Instruments. It is ideal for applications requiring simple counting and control of digital signals, such as frequency dividers, event counters, and address decoding.

How Does SN74LS190N Work?

The SN74LS190N works by incrementing or decrementing a 4-bit binary count based on the clock input and control signals. It features synchronous parallel loading and asynchronous master-reset for flexible operation. The counter can be cascaded to create larger count lengths or to implement complex counting sequences.

How Many Pins does SN74LS190N have and What are the Functions of the Pinout Configuration?

The SN74LS190N is housed in a 16-pin PDIP (Plastic Dual In-line Package) package. The pinout configuration includes:

  • MR (Pin 1): Master reset, asynchronous active LOW input.
  • CP (Pin 9): Clock input for counting operation.
  • UP/DOWN (Pin 10): Up/down control input.
  • D0-D3 (Pins 2, 3, 4, 5): Parallel data input for initial count.
  • QA-QD (Pins 6, 7, 14, 15): Binary counter outputs Q0-Q3.
  • NC (Pin 8): No connection.
  • RC (Pin 16): Ripple carry output for cascading multiple counters.

What are the Pros and Cons of SN74LS190N?

Pros:

  • Simple Operation: Provides easy-to-use up/down counter functionality for digital systems.
  • Synchronous Counting: Enables precise timing and parallel loading for flexible control.
  • Expandable: Can be cascaded to create larger count lengths or more complex counting sequences.
  • Wide Operating Voltage Range: Supports a wide range of supply voltages for versatile integration.

Cons:

  • Power Consumption: May have higher power consumption compared to more modern CMOS counterparts.
  • Obsolete Technology: Being an LS-TTL device, it may be considered obsolete for new designs.
  • Propagation Delay: Has inherent propagation delays in counting operations, limiting high-speed applications.

Are There Any Equivalents/Alternatives to SN74LS190N for Recommendation?

  • The CD4510 from Texas Instruments is a comparable synchronous up/down counter with additional features.
  • Alternatives to the SN74LS190N include the 74HC191 from NXP Semiconductors and the CD4029 from Texas Instruments.

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