74LV259

General description

The 74LV259 is a low-voltage Si-gate CMOS device that is pin and function compatible with 74HC259 and 74HCT259. The 74LV259 is a high-speed 8-bit addressable latch designed for general purpose storage applications in digital systems. The 74LV259 is multifunctional device capable of storing single-line data in eight addressable latches, and also 3-to-8 decoder and demultiplexer, with active HIGH outputs (Q0 to Q7), functions are available. The 74LV259 also incorporates an active LOW common reset (MR) for resetting all latches, as well as, an active LOW enable input (LE).

The 74LV259 has four modes of operation as shown in the mode select table. In the addressable latch mode, data on the data line (D) is written into the addressed latch. The addressed latch will follow the data input with all non-addressed latches remaining in their previous states. In the memory mode, all latches remain in their previous states and are unaffected by the data or address inputs. In the 3-to-8 decoding or demultiplexing mode, the addressed output follows the state of the (D) input with all other outputs in the LOW state. In the reset mode all outputs are LOW and unaffected by the address (A0 to A2) and data (D) input. When operating the 74LV259 as an address latch, changing more than one bit of address could impose a transient-wrong address. Therefore, this should only be done while in the memory mode.

Features

• Optimized for low voltage applications: 1.0 V to 3.6 V
• Accepts TTL input levels between V_CC = 2.7 V and V_CC = 3.6 V
• Typical output ground bounce < 0.8 V at V_CC = 3.3 V and T_amb = 25 Cel
• Typical HIGH-level output voltage (V_OH) undershoot: > 2 V at V_CC = 3.3 V and T_amb = 25 Cel
• Combines demultiplexer and 8-bit latch
• Serial-to-parallel capability
• Output from each storage bit available
• Random (addressable) data entry
• Easily expandable
• Common reset input
• Useful as a 3-to-8 active HIGH decoder
• ESD protection:
  • HBM JESD22-A114E exceeds 2000 V
  • MM JESD22-A115-A exceeds 200 V
• Multiple package options
• Specified from -40 Cel to +85 Cel and from -40 Cel to +125 Cel

Products/packages

Pricing/ordering/availability

Applications

Related applications
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)

Block diagrams/pinning

Parametrics/similar products

Similar products
74LV259 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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