Texas Instruments SNJ54ALS29821JT
- Part Number:
- SNJ54ALS29821JT
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6405886-SNJ54ALS29821JT
- Description:
- 10-Bit Bus Interface Flip-Flops With 3-State Outputs
- Datasheet:
- sn54als29821
- Number of channels10
- Technology familyALS
- Supply voltage (min) (V)4.75
- Supply voltage (max) (V)5.25
- Input typeBipolar
- Output type3-State
- Clock frequency (max) (MHz)75
- IOL (max) (mA)48
- IOH (max) (mA)-24
- Supply current (max) (μA)15000
- FeaturesHigh speed (tpd 10-50ns)
- Operating temperature range (°C)-55 to 125
- RatingMilitary
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 () 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.
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 of -55°C to 125°C. The SN74ALS29821 is characterized for operation from 0°C to 70°C.
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