74LS373 Octal D-Type Transparent Latch IC With 3-State Outputs

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The 74LS373 IC consists of eight D-Type latches/Flip-Flops with 3-state outputs for bus organized system applications. The high-impedance state and increased high-logic level drive provide these registers with the capability of being connected directly to and driving the bus lines in a bus-organized system without the need for interface or pull-up components. The eight latches of the 74LS373 are transparent D-type latches, meaning that while the enable (C or CLK) input is high, the Q outputs follow the data (D) inputs. When C or CLK is low, the output is latched at the level of the data that was set up. 74LS373 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The IC 74LS373 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.

What is a D-Type Latch/Flip-Flop?

A D-type Latch/flip-flop is a clocked latch which has two stable states. A D-type latch operates with a delay in input by one clock cycle. Thus, by cascading many D-type flip-flops delay circuits can be created, which are used in many applications such as in digital television systems. A D-type flip-flop is also known as a D flip-flop or a delay flip-flop.

74LS373 Pinout

74LS373 Pin Configuration

Pin NoPin NameDescription
1OE’Active Low Output Enable Pin
2O0Output Pin 0
3D0Data Input Pin 0
4D1Data Input Pin 1
5O1Output Pin 1
6O2Output Pin 2
7D2Data Input Pin 2
8D3Data Input Pin 3
9O3Output Pin 3
10GNDGround Pin
11LELatch Enable Input
12O4Output Pin 4
13D4Data Input Pin 4
14D5Data Input Pin 5
15O5Output Pin 5
16O6Output Pin 6
17D6Data Input Pin 6
18D7Data Input Pin 7
19O7Output Pin 7
20VccChip Supply Voltage

74LS373 Features & Specifications

  • Channels (#): 8
  • Technology Family: LS
  • VCC (Min): 4.75V
  • VCC (Max): 5.25V
  • Input type: Bipolar
  • Output type: 3-State
  • Clock Frequency (Max): 35MHz
  • IOL (Max): 24mA
  • IOH (Max): -2.6mA
  • ICC (Max): 40000uA
  • Propagation speed: (tpd 10-50ns)
  • 3-State Outputs for Driving Highly Capacitive or Low Impedance Loads
  • Choice of 8 D-type Flip-Flops in a Single Package
  • Full Parallel Access for Loading
  • Buffered Control Inputs
  • Standard TTL Switching Voltages

Applications

  • They are particularly useful for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers in modern computing systems.

You can download this datasheet for 74LS373 from the link given below:

See Also: 74LS08 Quadruple Two Input AND Gate – Datasheet | 74LS164 8-Bit Shift Register IC With Parallel Outputs – Datasheet | 74LS151 8 To 1 Line Selector Multiplexer IC – Datasheet