* Operating Range 2-V to 5.5-V VCC
* Contain Six Flip-Flops With Single-Rail Outputs
* Applications Include:
– Buffer/Storage Registers
– Shift Registers
– Pattern Generators
* Latch-Up Performance Exceeds 250 mA Per JESD 17
* ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)

The ’AHC174 devices are positive-edge-triggered D-type flip-flops with a direct clear (CLR) input and are designed for 2-V to 5.5-V VCC operation.
Information at the data (D) inputs that meets the setup time requirements is transferred to the
outputs on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a
particular voltage level and is not directly related to the transition time of the positive-going edge of CLK. When CLK is at either the high or low level, the D input has no effect at the output.


댓글을 달아 주세요 Comment

General Description
The DM74121 is a monostable multivibrator featuring both positive and negative edge triggering with complementary outputs. An internal 2kΩ timing resistor is provided for design convenience minimizing component count and layout problems. this device can be used with a single external capacitor. Inputs (A) are active-LOW trigger transition inputs and input (B) is and active-HIGH transition Schmitttrigger input that allows jitter-free triggering from inputs with
transition rates as slow as 1 volt/second.
A high immunity to VCC noise of typically 1.5V is also provided by internal circuitry at the input stage. To obtain optimum and trouble free operation please read operating rules and one-shot application notes carefully and observe recommendations.

* Triggered from active-HIGH transition or active-LOW transition inputs
* Variable pulse width from 30 ns to 28 seconds
* Jitter free Schmitt-trigger input
* Excellent noise immunity typically 1.2V
* Stable pulse width up to 90% duty cycle
* TTL, DTL compatible
* Compensated for VCC and temperature variations
* Input clamp diodes


댓글을 달아 주세요 Comment

 This multivibrator features both a negative, A, and a positive, B, transition triggered input, either of which can be used as an inhibit input. Also included is a clear input that when taken low resets the one shot. The HD74HC123A can be triggered on the positive transition of the clear while A is held low and B is held high.
 The HD74HC123A is retriggerable. That is it may be triggered repeatedly while their outputs are
generating a pulse and the pulse will be extended. Pulse width stability over a wide range of temperature. The output pulse equation is simply: tw = (Rext) (Cext).

·  High Speed Operation
·  High Output Current: Fanout of 10 LSTTL Loads
·  Wide Operating Voltage: VCC = 2 to 6 V
·  Low Input Current: 1 µA max
·  Low Quiescent Supply Current

TAG Clear, dual

댓글을 달아 주세요 Comment