DDU224F
10-TAP, TTL-INTERFACED FIXED DELAY LINE (SERIES DDU224F)
data 3 ® delay
devices, inc.
FEATURES
∙Ten equally spaced outputs
∙Very narrow device (SIP package)
∙Stackable for PC board economy
∙Input & outputs fully TTL interfaced & buffered
∙10 T2L fan-out capability
PACKAGES
1 2 3 4 5 6 7 8 9 10 11 12 13 14
VCC N/C IN T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 GND
DDU224F-xx Commercial
DDU224F-xxM Military
FUNCTIONAL DESCRIPTION |
PIN DESCRIPTIONS |
|
The DDU224F-series device is a 10-tap digitally buffered delay line. The |
IN |
Signal Input |
signal input (IN) is reproduced at the outputs (T1-T10), shifted in time by |
T1-T10 |
Tap Outputs |
an amount determined by the device dash number. The nominal tap-to- |
VCC |
+5 Volts |
tap delay increment is given by 1/10 of the dash number. For dash |
GND |
Ground |
numbers less than 50, the total delay of the line is measured from T1 to |
|
|
T10, with the nominal value given by 9 times the increment. The inherent delay from IN to T1 is nominally 3.5ns. For dash numbers greater than or equal to 50, the total delay of the line is measured from IN to T10, with the nominal value given by the dash number.
SERIES SPECIFICATIONS
∙Minimum input pulse width: 20% of total delay
∙Output rise time: 2ns typical
∙Supply voltage: 5VDC ± 5%
∙Supply current: ICCL = 50ma typical
ICCH = 15ma typical
∙Operating temperature: 0° to 70° C
∙Temp. coefficient of total delay: 100 PPM/°C
©1997 Data Delay Devices
DASH NUMBER SPECIFICATIONS
Part |
Total |
Delay Per |
|
Number |
Delay (ns) |
Tap (ns) |
|
DDU224F-10 |
9 ± 2.0 * |
1.0 ± 0.5 |
|
DDU224F-20 |
18 ± 2.0 * |
2.0 ± 1.0 |
|
DDU224F-25 |
22.5 ± 2.0 * |
2.5 ± 1.0 |
|
DDU224F-50 |
50 |
± 2.5 |
5.0 ± 2.0 |
DDU224F-100 |
100 ± 5.0 |
10.0 ± 3.0 |
|
DDU224F-150 |
150 ± 7.5 |
15.0 ± 3.0 |
|
DDU224F-200 |
200 |
± 10.0 |
20.0 ± 3.0 |
DDU224F-250 |
250 |
± 12.5 |
25.0 ± 3.0 |
DDU224F-300 |
300 |
± 15.0 |
30.0 ± 3.0 |
DDU224F-400 |
400 |
± 20.0 |
40.0 ± 4.0 |
DDU224F-500 |
500 |
± 25.0 |
50.0 ± 5.0 |
*Total delay is referenced to first tap output Input to first tap = 3.5ns ± 1ns
NOTE: Any dash number between 10 and 500 not shown is also available.
Doc #97015 |
DATA DELAY DEVICES, INC. |
1 |
1/29/97 |
3 Mt. Prospect Ave. Clifton, NJ 07013 |
DDU224F
APPLICATION NOTES
HIGH FREQUENCY RESPONSE
The DDU224F 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 20% of the total delay and periods as small as 40% 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 DDU224F relies on a stable power supply to produce repeatable delays within the stated tolerances. A 0.1uf capacitor from VCC to GND, located as close as possible to the VCC pin, is recommended. A wide VCC trace and a clean ground plane should be used.
3.5ns 10% 10% 10% 10% 10% 10% 10% 10% 10%
VCC IN |
T1 |
T2 |
T3 |
T4 |
T5 |
T6 |
T7 |
T8 |
T9 |
T10 GND |
Functional diagram for dash numbers < 50
10% 10% 10% 10% 10% 10% 10% 10% 10% 10%
VCC IN |
T1 |
T2 |
T3 |
T4 |
T5 |
T6 |
T7 |
T8 |
T9 |
T10 GND |
Functional diagram for dash numbers >= 50
Doc #97015 |
DATA DELAY DEVICES, INC. |
2 |
1/29/97 |
Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com |