|Category||Semiconductors => Logic => Flip-Flop/Latch/Register => D-Type Flip-Flop|
|Part family||SN74ALS29821 10-bit Bus Interface Flip-Flops With 3-State Outputs|
|Description||10-bit Bus Interface Flip-Flops With 3-State Outputs 24-SOIC 0 to 70|
|Company||Texas Instruments, Inc.|
|Datasheet||Download SN74ALS29821 datasheet
|Cross ref.||Similar parts: SNJ54ALS29821FK, SNJ54ALS29821JT, SN54ALS29821FK|
|Operating Temperature Range(C)||0 to 70|
|Approx. Price (US$)||3.59 | 1ku|
|tpd @ Nom Voltage(Max)(ns)||10|
|Output Drive (IOL/IOH)(Max)(mA)||48/-24|
|F @ Nom Voltage(Max)(Mhz)||75|
|ICC @ Nom Voltage(Max)(mA)||115|
|Pin nb||Package type||Ind std||JEDEC code||Package qty||Carrier||Device mark||Width (mm)||Length (mm)||Thick (mm)||Pitch (mm)|
|• Advanced Schottky (ALS and AS) Logic Families
This document introduces the advanced Schottky family of clamped TTL integrated circuits (ICs). Detailed electrical characteristics of the 'AS and 'ALS devices with table formats are provided. Guidelines for designing high-performance digital systems using | Doc
Functionally Equivalent to AMD's AM29821 Provide Extra Data Width Necessary for Wider Address/Data Paths or Buses With Parity Outputs Have Undershoot-Protection Circuitry Power-Up High-Impedance State Buffered Control Inputs Reduce dc Loading Effects Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic (NT) and Ceramic (JT) 300-mil DIPsdescription
These 10-bit edge-triggered D-type flip-flops feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. These devices are particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers. On the positive transition of the clock (CLK) input, the Q outputs are true to the data (D) input. A buffered output-enable (OE) input can place the ten outputs in either a normal logic state (high or low logic levels) or 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 flip-flops. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. The SN54ALS29821 is characterized for operation over the full military temperature range to 125°C. The SN74ALS29821 is characterized for operation from to 70°C.FUNCTION TABLE (each flip-flop) INPUTS OE CLK 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.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. 5.5 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.
SN54ALS29821 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, CLK high or low Setup time, data before CLK Hold time, data after CLK Operating free-air temperature NOM 5 MAX 5.5 SN74ALS29821 MIN NOM 5 MAX 5.25 UNIT ns °C
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
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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