|Category||Logic => Latches => Bipolar->ALS Family|
|Description||10-bit Bus-interface D-type Latch With 3-state Outputs|
|Company||Texas Instruments, Inc.|
|Datasheet||Download SN74ALS29841 datasheet
3-State Buffer-Type Outputs Drive Bus Lines Directly Bus-Structured Pinout Provides Extra Bus-Driving Latches Necessary for Wider Address/Data Paths or Buses With Parity Buffered Control Inputs Reduce dc Loading Effects Power-Up High-Impedance State Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (NT) 300-mil DIPsdescription
This 10-bit latch features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The ten latches are transparent D-type latches. The SN74ALS29841 has noninverting data (D) inputs. A buffered output-enable (OE) input can place the ten outputs in either a normal logic state (high or low logic levels) in a high-impedance state. The outputs also are in the high-impedance state during power-up and power-down conditions. The outputs remain in the high-impedance state while the device is powered down. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components. OE does not affect the internal operation of the latches. Old data can be retained or new data can be entered while the outputs are off. The SN74ALS29841 is characterized for operation from to 70°C.
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.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 a disabled 3-state output. 5.5 V Operating free-air temperature range, TA. to 70°C Storage temperature range. to 150°C
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.
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 5.25 UNIT ns °C
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH VOL IOZH IOZL II IIH IIL IOS ICC TEST CONDITIONS VCC 4.75 V, VCC V VCC 4.75 V, VCC 5.25 V, VCC 5.25 V, VCC 5.25 V, VCC 5.25 V, VCC 5.25 V, VCC 5.25 V, VCC 18 mA IOH 15 mA IOH 24 mA IOL V VO MIN 2.4 2 TYP MAX 1.2 UNIT µA mA
Outputs low 55 All typical values are at VCC = 25°C. Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
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