SCDS115C − JANUARY 2003 − REVISED OCTOBER 2003
SN74CBT16210C
20 BIT FET BUS SWITCH
5 V BUS SWITCH WITH 2 V UNDERSHOOT PROTECTION
PARAMETER MEASUREMENT INFORMATION
VCC
Input Generator
VIN
50
Ω
VG1
50
Ω
DUT
7V
Input Generator
50
Ω
VG2
VI
50
Ω
VO
CL
(see Note A)
RL
RL
S1
Open
GND
TEST CIRCUIT
TEST
tpd(s)
tPLZ/tPZL
tPHZ/tPZH
VCC
5 V
±
0.5 V
4V
5 V
±
0.5 V
4V
5 V
±
0.5 V
4V
S1
Open
Open
7V
7V
Open
Open
RL
500
Ω
500
Ω
500
Ω
500
Ω
500
Ω
500
Ω
VI
VCC or GND
VCC or GND
GND
GND
VCC
VCC
Output
Control
(VIN)
tPZL
CL
50 pF
50 pF
50 pF
50 pF
50 pF
50 pF
V
∆
0.3 V
0.3 V
0.3 V
0.3 V
3V
1.5 V
1.5 V
0V
tPLZ
3.5 V
1.5 V
VOL + V
∆
tPHZ
VOH − V
∆
VOH
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
VOL
Output
Control
(VIN)
tPLH
Output
3V
1.5 V
1.5 V
0V
tPHL
VOH
1.5 V
1.5 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (tpd(s))
Output
Waveform 1
S1 at 7 V
(see Note B)
tPZH
Output
Waveform 2
S1 at Open
(see Note B)
1.5 V
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤
10 MHz, ZO = 50
Ω,
tr
≤
2.5 ns, tf
≤
2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd(s). The tpd propagation delay is the calculated RC time constant of the typical ON-state
resistance of the switch and the specified load capacitance, when driven by an ideal voltage source (zero output impedance).
H. All parameters and waveforms are not applicable to all devices.
Figure 3. Test Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
