Doc #97034 DATA DELAY DEVICES, INC. 2
12/10/97 Tel: 973-773-2299 Fax: 973-773-9672 http://www.datadelay.com
APPLICATION NOTES
HIGH FREQUENCY RESPONSE
The DDU4C 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 DDU4C 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 SYMBOL MIN MAX UNITS NOTES
DC Supply Voltage V
DD
-0.3 7.0 V
Input Pin Voltage V
IN
-0.3 VDD+0.3 V
Storage Temperature T
STRG
-55 150 C
Lead Temperature T
LEAD
300 C 10 sec
TABLE 2: DC ELECTRICAL CHARACTERISTICS
(0C to 70C, 4.75V to 5.25V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
High Level Output Voltage V
OH
3.98 4.4 V VDD = 5.0, IOH = MAX
VIH = MIN, VIL = MAX
Low Level Output Voltage V
OL
0.15 0.26 V VDD = 5.0, IOL = MAX
VIH = MIN, VIL = MAX
High Level Output Current I
OH
-4.0 mA
Low Level Output Current I
OL
4.0 mA
High Level Input Voltage V
IH
3.15 V
Low Level Input Voltage V
IL
1.35 V
Input Current I
IH
0.10
µA
VDD = 5.0