DS1649_11 Datasheet, PDF (4/8 Pages) Texas Instruments – Hex TRI-STATE(RM) TTL to MOS Drivers

Switching Characteristics (V_CC e 5V T_A e 25 C) (Note 4)
Symbol
Parameter
Conditions
Min Typ Max Units
t_Sg
Storage Delay Negative Edge
(Figure 1 )
C_L e 50 pF
45
7
ns
C_L e 500 pF
75
12
ns
t_Sg
Storage Delay Positive Edge
(Figure 1 )
C_L e 50 pF
5
8
ns
C_L e 500 pF
8
13
ns
t_F
Fall Time
(Figure 1 )
C_L e 50 pF
5
8
ns
C_L e 500 pF
22
35
ns
t_R
Rise Time
(Figure 1 )
C_L e 50 pF
6
9
ns
C_L e 500 pF
21
35
ns
t_ZL
Delay from Disable Input to Logical ‘‘0’’
C_L e 50 pF
10
15
ns
Level (from High Impedance State)
R_L e 2 kX to V_CC (Figure 2 )
t_ZH
Delay from Disable Input to Logical ‘‘1’’
C_L e 50 pF
Level (from High Impedance State)
R_L e 2 kX to GND (Figure 2 )
8
15
ns
t_LZ
Delay from Disable Input to High Impedance C_L e 50 pF
State (from Logical ‘‘0’’ Level)
R_L e 400X to V_CC (Figure 3 )
15
25
ns
t_HZ
Delay from Disable Input to High Impedance C_L e 50 pF
State (from Logical ‘‘1’’ Level)
R_L e 400X to GND (Figure 3 )
10
25
ns
te ^{Note 1 ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed Except for ‘‘Operating Temperature Range’’}
they are not meant to imply that the devices should be operated at these limits The table of ‘‘Electrical Characteristics’’ provides conditions for actual device
operation
Note 2 Unless otherwise specified min max limits apply across the b55 C to a125 C temperature range for the DS1649 and DS1679 and across the 0 C to
a70 C range for the DS3649 and DS3679 All typical values are for T_A e 25 C and V_CC e 5V
Note 3 All currents into device pins shown as positive out of device pins as negative all voltages referenced to ground unless otherwise noted All values shown
as max or min on absolute value basis
Note 4 When measuring output drive current and switching response for the DS1679 and DS3679 a 15X resistor should be placed in series with each output This
AC Test Circuits and Switching Time Waveforms ^{le resistor is internal to the DS1649 DS3649 and need not be added}
t_Sg t_S’ t_R t_F
bso_{TL F 7515–4}
O ^FIGURE1
TL F 7515 – 5
3