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About Digital Latches
Digital latches are logic devices that latch onto or retain digital states (1 or 0) in data storage circuits. Because they use sequential logic, digital latches control and are controlled by other circuitry in a specific sequence that is determined by a control clock and enable/disenable control signals. Latches, which represent the simplest form of data storage, sometimes have an enable input that is used to control the latch, or to accept or ignore the input stage. Latch outputs respond immediately to changes at the input. Several types of digital latches are available. Data (D) and transparent D latches have a data input. S-R latches have either set (S) and reset (R) inputs, or set (S) and clear (C) inputs. Gate S-R latches have an enable input. Digital latches that contain an array of latches, each of which can be programmed, are also available.
Digital latches vary in terms of supply voltage, operating current, propagation delay, power dissipation, low level output current (sink), high level output current (source), and output characteristics. Supply voltages range from - 5 V to 5 V and include intermediate voltages such as -4.5 V, -3.3 V, -3 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, and 3.6 V. The operating current is the minimum current needed for active operation. The propagation delay is the time interval between the application of an input signal and the occurrence of the corresponding output. Power dissipation, the total power consumption of the device, is generally expressed in watts or milliwatts. The low-level output current (IOL) is the output current to which gates sink. The high-level output current (IOH) is the output current that gates source to a load. Three-state, open-collector, open-drain, and complementary outputs are available. Output enable (OE) inputs have an enable pin for the output.
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Engineering Web: Digital Latches
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Digital Latches Information | Business.com Digital Latches Home » Directory » Electronics & Digital Latches Search Thousands of Catalogs for Digital Latches www.globalspec.com See Business.com, Inc. Information |
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Semiconductor and Integrated Circuit Devices Latches & Registers (54) Multiplexers (143) Latches & Registers (220) Multiplexers (217) See ON Semiconductor L.L.C. Profile & Catalog |
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TI Standard Logic Products &... Flip-Flops, Latches and Registers (828) D-Type Latches (206) J-K Flip-Flops (39) |
