MDU28C
DUAL, HCMOS-INTERFACED
FIXED DELAY LINE
(SERIES MDU28C)
FEATURES
•
•
•
•
•
•
Two independent delay lines
Fits standard 8-pin DIP socket
Low profile
Auto-insertable
Input & outputs fully CMOS interfaced & buffered
10 T
2
L fan-out capability
I1
N/C
I2
GND
1
2
3
4
8
7
6
5
data
3
®
delay
devices,
inc.
PACKAGES
VDD
O1
N/C
O2
I1
N/C
N/C
N/C
I2
N/C
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VDD
N/C
O1
N/C
N/C
N/C
O2
MDU28C-xx
MDU28C-xxA1
MDU28C-xxB1
MDU28C-xxM
DIP
Gull-Wing
J-Lead
Military DIP
Military SMD
MDU28C-xxMD1
MDU28C-xxMD4
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.
PIN DESCRIPTIONS
I1-I2
O1-O2
VDD
GND
Signal Inputs
Signal Outputs
+5 Volts
Ground
SERIES SPECIFICATIONS
•
•
•
•
•
•
Minimum input pulse width:
100% of total delay
Output rise time:
8ns typical
Supply voltage:
5VDC
±
5%
Supply current:
I
CCL
= 40µa typical
I
CCH
= 45ma typical
Operating temperature:
0° to 70° C
Temp. coefficient of total delay:
300 PPM/°C
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
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
O1
O2
100%
100%
NOTE: Any dash number between 10 and 100
not shown is also available.
VDD
I1
I2
GND
Functional block diagram
©
1997 Data Delay Devices
Doc #97040
12/12/97
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
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
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.
DEVICE SPECIFICATIONS
TABLE 1: ABSOLUTE MAXIMUM RATINGS
PARAMETER
DC Supply Voltage
Input Pin Voltage
Storage Temperature
Lead Temperature
SYMBOL
V
DD
V
IN
T
STRG
T
LEAD
MIN
-0.3
-0.3
-55
MAX
7.0
V
DD
+0.3
150
300
UNITS
V
V
C
C
NOTES
10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
(0C to 70C, 4.75V to 5.25V)
PARAMETER
High Level Output Voltage
Low Level Output Voltage
High Level Output Current
Low Level Output Current
High Level Input Voltage
Low Level Input Voltage
Input Current
SYMBOL
V
OH
V
OL
I
OH
I
OL
V
IH
V
IL
I
IH
MIN
3.98
TYP
4.4
0.15
MAX
UNITS
V
V
mA
mA
V
V
µA
NOTES
V
DD
= 5.0, I
OH
= MAX
V
IH
= MIN, V
IL
= MAX
V
DD
= 5.0, I
OL
= MAX
V
IH
= MIN, V
IL
= MAX
0.26
-4.0
4.0
3.15
1.35
0.10
V
DD
= 5.0
Doc #97040
12/12/97
DATA DELAY DEVICES, INC.
Tel: 973-773-2299
Fax: 973-773-9672
http://www.datadelay.com
2
MDU28C
PACKAGE DIMENSIONS
8
7
6
5
Lead Material:
Nickel-Iron alloy 42
TIN PLATE
8
1
2
3
4
7
6
5
.440
MAX.
.280
MAX.
.290
MAX.
.020 .290
TYP. MAX.
.010±.002
.180
TYP.
.300
TYP.
.020
TYP.
1
2
3
4
.500 MAX.
.500 MAX.
.015 TYP.
.018
TYP.
.070 MAX.
.300±.010
3 Equal spaces
each .100±.010
Non-Accumulative
.350
MAX.
.010 TYP.
.300
TYP.
MDU28C-xx (Commercial DIP)
MDU28C-xxM (Military DIP)
.020
TYP.
8
7
6
5
.040
TYP.
.270
TYP.
1
2
3
4
.010 TYP.
.020
TYP.
8
7
6
5
.040
TYP.
.270
TYP.
1
2
3
4
.050 TYP.
.320
TYP.
.430
TYP.
.100
.300
.520 MAX.
.110
.300
MAX.
.050
TYP.
.100
.300
.520 MAX.
.110
.350
MAX.
.110
TYP.
MDU28C-xxA1 (Commercial Gull-Wing)
MDU28C-xxB1 (Commercial J-Lead)
.650
.100
1
14
.017
.510
MAX.
.100
1
14
.017
.510
MAX.
.300
TYP.
7
8
.300
TYP.
7
8
.100
.300
.200 MAX. (Com)
.225 MAX. (Mil)
.065
TYP.
.360
TYP.
.065
TYP.
.510 MAX.
.300
.050
.100
.080
.008
.200 MAX. (Com)
.225 MAX. (Mil)
.005
.510 MAX.
.050
.080
.025
.008
.045
.360 TYP.
.065 TYP.
.065 TYP.
MDU28C-xxD1 (Commercial SMD)
MDU28C-xxMD1 (Military SMD)
Doc #97040
12/12/97
MDU28C-xxD4 (Commercial SMD)
MDU28C-xxMD4 (Military SMD)
3
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
MDU28C
DELAY LINE AUTOMATED TESTING
TEST CONDITIONS
INPUT:
Ambient Temperature:
25
o
C
±
3
o
C
Supply Voltage (VDD):
5.0V
±
0.1V
Input Pulse:
High = 5.0V
±
0.1V
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:
PW
IN
= 1.5 x Total Delay
Period:
PER
IN
= 10 x Total Delay
OUTPUT:
Load:
C
load
:
Threshold:
1 FAST-TTL Gate
5pf
±
10%
2.5V (Rising & Falling)
NOTE:
The above conditions are for test only and do not in any way restrict the operation of the device.
COMPUTER
SYSTEM
PRINTER
REF
PULSE
GENERATOR
OUT
TRIG
I2
I1
DEVICE UNDER
TEST (DUT)
O1
IN
TRIG
O2
TIME INTERVAL
COUNTER
Test Setup
PER
IN
PW
IN
T
RISE
INPUT
SIGNAL
4.5V
2.5V
0.5V
T
FALL
V
IH
4.5V
2.5V
0.5V
V
IL
T
FALL
T
RISE
OUTPUT
SIGNAL
V
OH
2.5V
2.5V
V
OL
Timing Diagram For Testing
Doc #97040
12/12/97
DATA DELAY DEVICES, INC.
Tel: 973-773-2299
Fax: 973-773-9672
http://www.datadelay.com
4
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
