Features: · Balanced propagation delays· All inputs have a Schmitt-trigger action· 3-state non-inverting outputs for bus orientated applications· 8-bit positive, edge-triggered register· Independent register and 3-state buffer operation· Common 3-state output enable input· For 74AHC574 only: opera...
74AHCT574: Features: · Balanced propagation delays· All inputs have a Schmitt-trigger action· 3-state non-inverting outputs for bus orientated applications· 8-bit positive, edge-triggered register· Independent...
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Symbol | Parameter | Conditions | Min | Max | Unit |
VCC | supply voltage | -0.5 | +7.0 | V | |
IIK | input clamping current |
VI < -0.5 V[1] | -20 | mA | |
VI | input voltage | -0.5 | +7.0 | V | |
IOK | output clamping current |
VO < -0.5 V or VO > VCC + 0.5 V[1] | - | ±20 | mA |
IO | output current | VO = -0.5 V to (VCC + 0.5 V) | - | ±25 | mA |
ICC | quiescent supply current |
- | 75 | mA | |
IGND | ground current | -75 | - | mA | |
Tstg | storage temperature | -65 | +150 | ||
Ptot | total power dissipation | Tamb = -40 °C to +125 °C[2] | |||
SO20 package | [2] | 500 | mW | ||
TSSOP20 package | [3] | 500 | mW | ||
DHVQFN20 package | [4] | - | 500 | mW |
The 74AHCT574 are high-speed Si-gate CMOS devices and are pin compatible with Low Power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
The 74AHCT574 are octal D-type flip-flops featuring separate D-type in
puts for each flip-flop and 3-state outputs for bus oriented applications. A clock (CP) and an output enable (OE) input are common to all flip-flops.
The 8 flip-flops of the 74AHCT574 will store the state of their individual D-inputs that meet the set-up and hold times requirements on the LOW-to-HIGH CP transition.
When OE is LOW the contents of the 8 flip-flops are available at the outputs. When OE is HIGH, the outputs go to the high-impedance OFF-state. Operation of the OE input does not affect the state of the flip-flops.
The 74AHCT574 is functionally identical to the 74AHC564; 74AHCT564, but has non-inverting outputs. The 74AHCT574 is functionally identical to the 74AHCT374, but has a different pinning.