Details, datasheet, quote on part number: SN54ALS373
PartSN54ALS373
CategoryLogic => Latches
DescriptionOctal Transparent D-type Latches With 3-state Outputs
CompanyTexas Instruments, Inc.
DatasheetDownload SN54ALS373 datasheet
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Features, Applications
SN74ALS373A, SN74AS373 OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS

Eight Latches in a Single Package 3-State Bus-Driving True Outputs Full Parallel Access for Loading Buffered Control Inputs pnp Inputs Reduce dc Loading on Data Lines Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs These octal transparent D-type latches feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the logic levels set up at the D inputs. A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components.

OE does not affect internal operations of the latches. Old data can be retained or new data can be entered while the outputs are off. The SN54ALS373 and SN54AS373 are characterized for operation over the full military temperature range to 125C. The SN74ALS373A and SN74AS373 are characterized for operation from to 70C.

FUNCTION TABLE (each latch) INPUTS OE LE OUTPUT Q0 Z

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

SN74ALS373A, SN74AS373 OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage, VCC. 7 V Input voltage, VI. 7 V Voltage applied to any output in the high state or power-off state. 5.5 V Operating free-air temperature range, TA: to 70C Storage temperature range. to 150C

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

SN54ALS373 MIN VCC VIH VIL IOH IOL tw tsu th TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Pulse duration, LE high Setup time, data before LE Hold time, data after LE Operating free-air temperature NOM 5 MAX 5.5 SN74ALS373A MIN NOM 5 MAX 5.5 UNIT ns C

SN74ALS373A, SN74AS373 OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS

electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)

Outputs disabled All typical values are at VCC = 25C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.


 

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