DM9601 datasheet(3/6 Pages) NSC

3 / 6 page

Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)

Symbol

Parameter

From (Input)

Conditions

Min

Max

Units

To (Output)

tPLH

Propagation Delay Time

Negative Trigger

CL e 15 pF

Low to High Level Output

Input to

CX e 040

True Output

RX e 5kX

tPHL

Propagation Delay Time

Negative Trigger

High to Low Level Output

Input to

Complement Output

tPW(MIN)

Minimum True Output

Pulse Width

tPW

Pulse Width

RX e 10 kX

308

376

CX e 1000 pF

CSTRAY

Maximum Allowable

Pin 13 to GND

Wiring Capacitance

External Timing Resistor

DM96

External Timing Resistor

DM86

Operating Rules

1 An external resistor RX and an external capacitor CX are

required for operation The value of RX can vary between

the limits shown in switching characteristics The value of

CX is optional and may be adjusted to achieve the re-

quired output pulse width

2 Output pulse width tPW may be calculated as follows

tPW e KRXCX 1 a

( (forCXl103pF)

034

RX in kX CX in pF and tPW in ns

(For CX k 103 pF see curve)

3 RX and CX must be kept as close as possible to the

circuit in order to minimize stray capacitance and noise

pickup If remote trimming is required RX may be split up

such that at least RX(MIN) must be as close as possible

to the circuit and the remote portion of the trimming re-

sistor R k RX(MAX) b RX

4 Set-up time (t1) for input trigger pulse must be l 40 ns

(See

Figure 1 )

Release time (t2) for input trigger pulse must be l 40 ns

(See

Figure 2 )

TLF6610 – 2

FIGURE 1

TLF6610 – 3

FIGURE 2

5 Retrigger pulse width (see

Figure 3 ) is calculated as fol-

lows

tW e tPW a tPLH e KRXCX 1 a

( atPLH

TLF6610 – 4

FIGURE 3

Typical ‘‘K’’ Coefficient Variation vs Timing Capacitance

The multiplicative factor ‘‘K’’ varies as a function of the tim-

ing capacitor CX The graph below details this characteris-

tic

TLF6610 – 5

For further detailed device characteristics and output performance please

refer to the NSC one-shot application note AN-366

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