Doc #97017 DATA DELAY DEVICES, INC. 2
1/30/97 Tel: 973-773-2299   Fax: 973-773-9672   http://www.datadelay.com
APPLICATION NOTES
HIGH FREQUENCY RESPONSE
The SMD99F 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 40% of the total delay and periods as 
small as 80% 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 SMD99F 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.
DEVICE SPECIFICATIONS
TABLE 1: ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL MIN MAX UNITS NOTES
DC Supply Voltage V
CC
-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
2.5 3.4 V VCC = MIN, IOH = MAX 
VIH = MIN, VIL = MAX
Low Level Output Voltage V
OL
0.35 0.5 V VCC = MIN, IOL = MAX 
VIH = MIN, VIL = MAX
High Level Output Current I
OH
-1.0 mA
Low Level Output Current I
OL
20.0 mA
High Level Input Voltage V
IH
2.0 V
Low Level Input Voltage V
IL
0.8 V
Input Clamp Voltage V
IK
-1.2 V VCC = MIN, II = I
IK
Input Current at Maximum 
Input Voltage
I
IHH
0.1 mA VCC = MAX, VI = 7.0V
High Level Input Current I
IH
20
µA
VCC = MAX, VI = 2.7V
Low Level Input Current I
IL
-0.6 mA VCC = MAX, VI = 0.5V
Short-circuit Output Current I
OS
-60 -150 mA VCC = MAX 
Output High Fan-out 25 Unit 
Output Low Fan-out 12.5 Load