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DS1040Z-100 |DS1040Z100DSN/a4avaiProgrammable One-Shot Pulse Generator
DS1040Z-A15 |DS1040ZA15DSN/a6avaiProgrammable One-Shot Pulse Generator
DS1040Z-A15+ |DS1040ZA15+MAXIMN/a751avaiProgrammable One-Shot Pulse Generator


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DS1040Z-100-DS1040Z-A15-DS1040Z-A15+
Programmable One-Shot Pulse Generator
FEATURESAll-silicon pulse width generatorFive programmable widthsEqual and unequal increments availablePulse widths from 5 ns to 500 nsWidths are stable and preciseRising edge-triggeredInverted and non-inverted outputsWidth tolerance 5% or 2 ns, whichever is
greaterEconomicalAuto-insertable, low profileLow-power CMOSTTL/CMOS-compatibleVapor phase, IR and wave solderableCustom widths availableFast turn prototypesExtended temperature range available
PIN ASSIGNMENT
PIN DESCRIPTION

IN – Trigger Input
P0-P2 – Programming Pins
GND – Ground
OUT – Pulse Output
OUT – Inverted Pulse Output
VCC – +5V
DESCRIPTION

The DS1040 Pulse Generator is a user-programmable one-shot with a choice of five precise pulse widths.
Maximum widths range from 50 ns to 500 ns; increments range from 2.5 ns to 100 ns. For maximum
flexibility in applications such as magneto-optical read/write disk laser power control, varieties are
offered with equal and unequal increments. The DS1040 is offered in standard 8-pin DIPs and 8-pin
mini-SOICs. Low cost and superior reliability over hybrid technology are achieved by the combination
of a 100% CMOS silicon design and industry standard packaging. The DS1040 series of pulse generators
provide a nominal width accuracy of 5% or 2 ns, whichever is greater. In response to the rising edge
of the input (trigger) pulse, the DS1040 produces an output pulse with a width determined by the logic
states of the three parallel programming pins. For convenience, both inverting and non-inverting outputs
are supplied. The intrinsic delay between the trigger pulse and the output pulse is no more than 10 ns.
Each output is capable of driving up to five 74LS loads.
DS1040
Programmable One-Shot
Pulse Generator
www.dalsemi.com

DS1040Z 8-Pin SOIC (150-mil)
See Mech. Drawings Section
OUT
OUT
GND
VCC
DS1040M 8-Pin DIP (300-mil)
See Mech. Drawings Section
VCC
OUT
OUT
GND
DS1040
LOGIC DIAGRAM Figure 1
PULSE WIDTH VS. PROGRAMMED VALUE Table 1
PROGRAMMING
PINS
MAX
WIDTH
MIN
WIDTH
MAX
WIDTH
MAX
WIDTH
MAX
WIDTH

MSB P200001111
P100110011
LSB P001010101
PART
NUMBER

DS1040-757515304560757575
DS1040-10010020406080100100100
DS1040-150150306090120150150150
DS1040-2002004080120160200200200
DS1040-25025050100150200250250250
DS1040-500500100200300400500500500
DS1040-B505030354045505050
DS1040-D606020304050606060
DS1040-A151557.51012.5151515
DS1040-A20201012.51517.5202020
DS1040-A3232.522.52527.53032.532.532.5
DS1040-B404020253035404040
DS1040-D707030405060707070
All times in nanoseconds.
DS1040
ABSOLUTE MAXIMUM RATINGS*

Voltage on any Pin Relative to Ground-1.0V to +7.0V
Operating Temperature 0C to 70C
Storage Temperature -55C to +125C
Soldering Temperature 260C for 10 seconds
Short Circuit Output Current 50 mA for 1 second
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
DC ELECTRICAL CHARACTERISTICS
(0°C to 70°C; VCC = 5.0V  5%)
PARAMETERSYMBOLTESTMINTYPMAXUNITSNOTES

Supply VoltageVCC4.755.005.25V1
High Level Input
VoltageVIH2.2VCC
+ 0.5V1
Low Level Input
VoltageVIL-0.50.8V1
Input Leakage
CurrentII0.0 ≤ VI ≤VCC-1.01.0µA
Active CurrentICCVCC = Max;
Period = Min3575mA2, 6
High Level Output
CurrentIOHVCC = Min
VOH = 4-1mA
Low Level Output
CurrentIOLVCC = Min
VOL = 0.58mA
AC ELECTRICAL CHARACTERISTICS
(TA = 25°C; VCC = 5.0V  5%)
PARAMETERSYMBOLMINTYPMAXUNITSNOTES

Programming SetuptPS5ns
Programming HoldtPH0ns
Input Pulse Width at Logic 1tWIH5ns
Input Pulse Width at Logic 0tWIL5ns
Intrinsic DelaytD0510ns
Output Pulse WidthtWOTable 1ns3, 4, 5, 7
Power-up TimetPU100ms
PeriodPeriodtWO + 50ns
CAPACITANCE
(TA = 25°C)
PARAMETERSYMBOLMINTYPMAXUNITSNOTES
DS1040
NOTES:

1. All voltages are referenced to ground.
2. Measured with outputs open, minimum period.
3. VCC = 5V @ 25C. Width accurate to within 2 ns or 5%.
4. Temperature variations between 0C and 70C may increase or decrease width by an additional 1 ns
or 3%, whichever is greater.
5. For DS1040 pulse generators with maximum widths less than 50 ns, temperature variations between
0C and 70C may increase or decrease width by 1 ns or 9%, whichever is greater.
6. ICC is a function of frequency and maximum width. Only a pulse generator operating with 40 ns
period and VCC =5.25V will have an ICC =75 mA. For example, a -100 will never exceed 30 mA, etc.
7. See “Test Conditions” sections at the end of this data sheet.
TIMING DIAGRAM Figure 2
DS1040
POWER-UP TIMING DIAGRAM Figure 3
TEST CIRCUIT Figure 4
TERMINOLOGY
Period: The time elapsed between the leading edge of the first trigger pulse and the leading edge of the

following trigger pulse.
tWIH , WIL , WO (Pulse Width): The elapsed time on the pulse between the 1.5V point on the leading edge
DS1040
tRISE (Input Rise Time): The elapsed time between the 20% and the 80% point on the leading edge of

the input pulse.
tFALL (Input Fall Time): The elapsed time between the 80% and the 20% point on the trailing edge of

the input pulse.
tD (Intrinsic Delay): The elapsed time between the
1.5 point on the leading edge of the input trigger
pulse and the 1.5V point on the leading edge of output pulse.
tPU (Power-up Time):
After VCC is valid, the time required before timing specifications is within
tolerance.
TEST SETUP DESCRIPTION

Figure 4 illustrates the hardware configuration used for measuring the timing parameters on the DS1040.
The input waveform is produced by a precision pulse generator under software control. The intrinsic
delay is measured by a time interval counter (20 ps resolution) connected between the input and each
output. Outputs are selected and connected to the counter by a VHF switch control unit. Width
measurements are made by directing both the start and stop functions of the counter to the same output.
All measurements are fully automated, with each instrument controlled by a central computer over an
IEEE 488 bus.
TEST CONDITIONS
Input:

Ambient Temperature: 25C + 3C
Supply Voltage (VCC):5.0V + 0.1V
Input Pulse: High = 3.0V + 0.1V
Low = 0.0V + 0.1
Source Impedance: 50 ohm max.
Rise and Fall Time: 3.0 ns max. (measured
between 0.6V and 2.4)
Pulse Width: 500 ns (1 s for -500)
Period: 1 s (2 s for -500)
Output:

The output is loaded with a 74F04. Delay is measured at the 1.5V level on the rising and falling edge.
Note:

Above conditions are for test only and do not restrict the operation of the device under other data sheet
conditions.
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