DS1044
4-in-1 High-Speed Silicon Delay Line
www.dalsemi.com
FEATURES
All-silicon timing circuit
Four independent buffered delays
Initial delay tolerance
±1.5
ns
Stable and precise over temperature and
voltage
Leading and trailing edge precision preserves
the input symmetry
Standard 14-pin DIP, 14-pin SOIC (150-mil)
Vapor phase, IR and wave solderable
Available in Tape and Reel
PIN ASSIGNMENT
IN1
NC
IN2
IN3
IN4
NC
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
NC
OUT1
NC
OUT2
OUT3
OUT4
DS1044 14-Pin DIP
DS1044R 14-Pin SOIC (150-mil)
See Mech. Drawings Section
PIN DESCRIPTION
IN1-IN4
OUT1-OUT4
NC
V
CC
GND
- Input Signals
- Output Signals
- No Connection
- +5-Volt Supply
- Ground
DESCRIPTION
The DS1044 series is a 4-in-1 version of the low-power, +5 volt, high speed DS1035.
The DS1044 series of delay lines have four independent logic buffered delays in a single package. The
device is Dallas Semiconductor’s fastest 4-in-1 delay line. It is available in a standard 14-pin DIP and
14-pin SOIC.
The device features precise leading and trailing edge accuracies. It has the inherent reliability of an
all-silicon delay line solution. The DS1044’s nominal tolerance is ±1.5 ns and an additional tolerance
over temperature and voltage of ±1.0 ns for the faster delays. Each output is capable of driving up to 10
LS loads.
Standard delay values are indicated in Table 1.
(972) 371-4348 for further information.
Customers may contact Dallas Semiconductor at
1 of 6
111899
DS1044
LOGIC DIAGRAM
Figure 1
ONE OF FOUR
PART NUMBER DELAY TABLE (t
PLH
, t
PHL
)
Table 1
PART NUMBER
DS1044-50
DS1044-60
DS1044-70
DS1044-80
DS1044-10
DS1044-12
DS1044-14
DS1044-18
DS1044-20
DS1044-25
DELAY PER
OUTPUT (ns)
5
6
7
8
10
12
14
18
20
25
INITIAL TOLERANCE
±1.5
ns
±1.5
ns
±1.5
ns
±1.5
ns
±1.5
ns
±1.5
ns
±1.5
ns
±1.5
ns
±1.5
ns
±2.0
ns
TOLERANCE OVER
TEMPERATURE
AND VOLTAGE
±1.0
ns
±1.0
ns
±1.0
ns
±1.0
ns
±1.0
ns
±1.0
ns
±1.5
ns
±1.5
ns
±1.5
ns
±1.5
ns
NOTES:
1. Nominal conditions are +25°C and V
CC
=+5.0 volts.
2. Temperature range of 0°C to 70°C and voltage range of 4.75 volts to 5.25 volts.
3. Delay accuracy is for both leading and trailing edges.
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DS1044
TEST SETUP DESCRIPTION
Figure 2 illustrates the hardware configuration used for measuring the timing parameters of the DS1044.
The input waveform is produced by a precision pulse generator under software control. Time delays are
measured by a time interval counter (20 ps resolution ) connected to the output. The DS1044 output taps
are selected and connected to the interval counter by a VHF switch control unit. All measurements are
fully automated with each instrument controlled by the computer over an IEEE 488 bus.
DS1033 TEST CIRCUIT
Figure 2
OUTPUTS 1-4
3 of 6
DS1044
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
Storage Temperature
Soldering Temperature
Short Circuit Output Current
-1.0V to +7.0V
0°C to 70°C
-55°C to +125°C
260°C for 10 seconds
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
PARAMETER
Supply Voltage
Active Current
High Level Input Voltage
Low Level Input Voltage
Input Leakage
High Level Output Current
Low Level Output Current
SYMBOL
V
CC
I
CC
V
IH
V
IL
I
L
I
OH
I
OL
0V≤V
I
≤V
CC
V
CC
=4.75V
V
OH
=4V
V
CC
=4.75V
V
OL
=0.5V
V
CC
=5.25V
Period=1µs
TEST
CONDITION
(0°C to 70°C; V
CC
=+5V ± 5%)
MIN
4.75
TYP
5.00
MAX
5.25
45
2.2
-0.5
-1.0
V
CC
+0.5
0.8
1.0
-1.0
12
UNITS
V
mA
V
V
µA
mA
mA
AC ELECTRICAL CHARACTERISTICS
PARAMETER
Period
Input Pulse Width
Input-to-Tap Output Delay
Output Rise or Fall Time
Power-up Time
SYMBOL
t
PERIOD
t
WI
t
PLH,
t
PHL
t
OR,
t
OF
t
PU
MIN
2 (t
WI
)
100% of
Tap Delay
Table 1
2.0
TYP
(+25°C; V
CC
=5V ± 5%)
MAX
UNITS
ns
ns
ns
2.5
100
ns
ms
NOTES
3
3
CAPACITANCE
PARAMETER
Input Capacitance
SYMBOL
C
IN
MIN
TYP
MAX
10
pF
(T
A
=25°C)
UNITS
NOTES
4 of 6
DS1044
Ambient Temperature:
25°C
±=3°C
Supply Voltage (V
CC
):
5.0V
±=0.1V
Input Pulse:
High: 3.0V
±=0.1V
Low: 0.0V
±=0.1V
Source Impedance: 50Ω=max.
Rise and Fall Time: 3.0 ns max. - Measured between 0.6V and 2.4V.
Pulse Width: 500 ns
Pulse Period: 1
µs
Output Load Capacitance: 15 pF
Output:
Each output is loaded with the equivalent of one 74F04 input gate.
Data is measured at the 1.5V level on the rising and falling edges.
Note:
The above conditions are for test only and do not restrict the devices under other data sheet
conditions.
TEST CONDITIONS
TIMING DIAGRAM
NOTES:
1. All voltages are referenced to ground.
2. @ V
CC
=5 volts and 25°C, delay accuracy on both the rising and falling edges within tolerances given
in Table 1.
3. Pulse width and duty cycle specifications may be exceeded; however, accuracy will be application-
sensitive with respect to decoupling, layout, etc.
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stm32/stm8
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