MDU28C
DUAL, HCMOS-INTERFACED
data
3
1
14
I1
VDD
FIXED DELAY LINE
(SERIES MDU28C)
delay
devices, inc.
FEATURES PACKAGES
I1
• Two independent delay lines
• Fits standard 8-pin DIP socket
• Low profile
• Auto-insertable
N/C
GND
1
2
I2
3
4
• Input & outputs fully CMOS interfaced & buffered
• 10 T2L fan-out capability
MDU28C-xx DIP
MDU28C-xxA1 Gull-Wing
MDU28C-xxB1 J-Lead
MDU28C-xxM Military DIP
FUNCTIONAL DESCRIPTION
The MDU28C-series device is a 2-in-1 digitally buffered delay line. The
signal inputs (I1-I2) are reproduced at the outputs (O1-O2), shifted in time
by an amount determined by the device dash number (See Table). The
delay lines function completely independently of each other.
VDD
8
O1
7
N/C
6
O2
5
N/C
N/C
N/C
N/C
GND
PIN DESCRIPTIONS
I1-I2 Signal Inputs
O1-O2 Signal Outputs
VDD +5 Volts
GND Ground
2
13
3
12
4
11
5
I2
Military SMD
MDU28C-xxMD1
MDU28C-xxMD4
10
6
9
7
8
N/C
O1
N/C
N/C
N/C
O2
SERIES SPECIFICATIONS
• Minimum input pulse width: 100% of total delay
• Output rise time: 8ns typical
• Supply voltage: 5VDC ± 5%
• Supply current: I
I
= 40µa typical
CCL
= 45ma typical
CCH
• Operating temperature: 0° to 70° C
• Temp. coefficient of total delay: 300 PPM/°C
O2O1
100%
100%
VDD GNDI1 I2
Functional block diagram
DASH NUMBER SPECIFICATIONS
Part
Number
MDU28C-10
MDU28C-12
MDU28C-16
MDU28C-20
MDU28C-25
MDU28C-30
MDU28C-35
MDU28C-40
MDU28C-45
MDU28C-50
MDU28C-60
MDU28C-75
MDU28C-100
NOTE: Any dash number between 10 and 100
not shown is also available.
Delay Per
Line (ns)
10 ± 2.0
12 ± 2.0
16 ± 2.0
20 ± 2.0
25 ± 2.0
30 ± 2.0
35 ± 2.0
40 ± 2.0
45 ± 2.2
50 ± 2.5
60 ± 3.0
75 ± 3.7
100 ± 5.0
1997 Data Delay Devices
Doc #97040 DATA DELAY DEVICES, INC. 1
12/12/97 3 Mt. Prospect Ave. Clifton, NJ 07013
MDU28C
APPLICATION NOTES
HIGH FREQUENCY RESPONSE
The MDU28C tolerances are guaranteed for
input pulse widths and periods greater than those
specified in the test conditions. Although the
device will function properly for pulse widths as
small as 100% of the total delay and periods as
small as 200% of the total delay (for a symmetric
input), the delays may deviate from their values
at low frequency. However, for a given input
condition, the deviation will be repeatable from
pulse to pulse. Contact technical support at Data
DEVICE SPECIFICATIONS
TABLE 1: ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL MIN MAX UNITS NOTES
DC Supply Voltage V
Input Pin Voltage V
Storage Temperature T
Lead Temperature T
DD
IN
STRG
LEAD
Delay Devices if your application requires device
testing at a specific input condition.
POWER SUPPLY BYPASSING
The MDU28C relies on a stable power supply to
produce repeatable delays within the stated
tolerances. A 0.1uf capacitor from VDD to GND,
located as close as possible to the VDD pin, is
recommended. A wide VDD trace and a clean
ground plane should be used.
-0.3 7.0 V
-0.3 VDD+0.3 V
-55 150 C
300 C 10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
High Level Output Voltage V
Low Level Output Voltage V
High Level Output Current I
Low Level Output Current I
High Level Input Voltage V
Low Level Input Voltage V
Input Current I
(0C to 70C, 4.75V to 5.25V)
OH
OL
OH
OL
IH
IL
IH
3.98 4.4 V VDD = 5.0, IOH = MAX
0.15 0.26 V VDD = 5.0, IOL = MAX
3.15 V
-4.0 mA
4.0 mA
1.35 V
0.10
µA
VIH = MIN, VIL = MAX
VIH = MIN, VIL = MAX
VDD = 5.0
Doc #97040 DATA DELAY DEVICES, INC. 2
12/12/97 Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
MDU28C
MDU28C-xx (Commercial DIP)
.500 MAX.
1 2 3 4
.015 TYP.
.070 MAX.
MDU28C-xxM (Military DIP)
.500 MAX.
.520 MAX.
.100
.110
.300
.010 TYP.
.520 MAX.
.100
.110
.300
.050 TYP.
.510 MAX.
.017
.050
.100
.100
.300
.300
.008
.045
.025
.080
.080
.510 MAX.
.017
.050
.100
.100
.650
.008
.005
.065 TYP.
.360 TYP.
.065 TYP.
.018
TYP.
.300±.010
3 Equal spaces
each .100±.010
Non-Accumulative
PACKAGE DIMENSIONS
5678
Lead Material:
Nickel-Iron alloy 42
.290
MAX.
TIN PLATE
.010±.002
.280
MAX.
.350
MAX.
1 2 3 4
.300
TYP.
5678
.440
MAX.
.290
.020
MAX.
TYP.
.180
TYP.
.020
TYP.
.010 TYP.
.300
TYP.
.020
TYP.
1 2 3 4
.040
TYP.
5678
.270
TYP.
.300
MAX.
.430
TYP.
.050
TYP.
MDU28C-xxA1 (Commercial Gull-Wing)
1
.300
TYP.
7 8
.200 MAX. (Com)
.225 MAX. (Mil)
14
.510
MAX.
.020
TYP.
1 2 3 4
5678
.040
TYP.
.270
TYP.
.350
MAX.
.320
TYP.
.110
TYP.
MDU28C-xxB1 (Commercial J-Lead)
1
.300
TYP.
7 8
.200 MAX. (Com)
.225 MAX. (Mil)
14
.510
MAX.
.065
TYP.
MDU28C-xxD1 (Commercial SMD)
MDU28C-xxMD1 (Military SMD)
Doc #97040 DATA DELAY DEVICES, INC. 3
12/12/97 3 Mt. Prospect Ave. Clifton, NJ 07013
.360
TYP.
.065
TYP.
MDU28C-xxD4 (Commercial SMD)
MDU28C-xxMD4 (Military SMD)
MDU28C
DELAY LINE AUTOMATED TESTING
O1
OUT
TRIGINREF
TRIG
PRINTER
I1O2I2
0.5V
0.5V
2.5V
2.5V
4.5V
4.5V
2.5V
2.5V
TEST CONDITIONS
INPUT: OUTPUT:
Ambient Temperature: 25oC ± 3oC Load: 1 FAST-TTL Gate
Supply Voltage (VDD): 5.0V ± 0.1V C
Input Pulse: High = 5.0V ± 0.1V Threshold: 2.5V (Rising & Falling)
Low = 0.0V ± 0.1V
Source Impedance: 50Ω Max.
Rise/Fall Time: 5.0 ns Max. (measured
between 0.5V and 4.5V )
Pulse Width: PWIN = 1.5 x Total Delay
Period: PERIN = 10 x Total Delay
NOTE: The above conditions are for test only and do not in any way restrict the operation of the device.
COMPUTER
SYSTEM
: 5pf ± 10%
load
PULSE
GENERATOR
INPUT
SIGNAL
OUTPUT
SIGNAL
T
RISE
T
RISE
PW
V
IN
IH
DEVICE UNDER
TEST (DUT)
Test Setup
PER
IN
V
OH
T
FALL
T
FALL
TIME INTERVAL
COUNTER
V
IL
V
OL
Timing Diagram For Testing
Doc #97040 DATA DELAY DEVICES, INC. 4
12/12/97 Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
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