DS8881 Datasheet, PDF (3/6 Pages) National Semiconductor (TI) – Vacuum Fluorescent Display Driver

Switching Characteristics T_A e 25 C unless otherwise specified
Symbol
Parameter
Conditions
Min Typ Max Units
t_pd0
Propagation Delay to a Logical ‘‘0’’
from Enable Input to Digit Output
1
ms
t_pd0
Propagation Delay to a Logical ‘‘0’’
A B C D to Digit Output
R_L e 4 7 kX C_L e 50 pF V_BB e b23V V_SS e 8V
t_pd1
Propagation Delay to a Logical ‘‘1’’
from Enable Input to Digit Output
1
ms
300 ns
t_pd1
Propagation Delay to a Logical ‘‘1’’
from A B C D to Digit Output
500 ns
t_FALL
Oscillator Output Transition Time
from 1 to 0
V_SS e 9 5V R_L e 6k to V_SS C_L e 25 pF
50 ns
f_OSC
dc
Oscillator Frequency
Oscillator Duty Cycle
7V ^k V_SS ^k 9 5V R_T e 27 kX g2% R_L e 1 3k
C_T e 100 pF g5% C_L e 50 pF
320 360 400 kHz
46 56 66 %
AC Test Circuit
TL F 5846 – 2
3