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.
Products containing the "SN74ALS29821" keyword are: SN74ALS29821DW , SN74ALS29821DW , SN74ALS29821DWR , SN74ALS29821DWR , SN74ALS29821DWRG4 , SN74ALS29821NT , SN74ALS29821NT
Status | ACTIVE |
SubFamily | D-type flip-flop |
Technology Family | ALS |
VCC | 5.25 |
Bits | 10 |
Voltage | 5 |
F @ nom voltage | 75 |
ICC @ nom voltage | 115 |
tpd @ Nom Voltage | 10 |
3-state output | Yes |
Rating | Catalog |
Operating temperature range | 0 to 70 |
Package Group | SOIC|24 |
Package size: mm2:W x L (PKG) | [pf]24SOIC[/pf]: 160 mm2: 10.3 x 15.5 (SOIC|24) |
Approx. price | 3.59 | 1ku |