Datasheet

SN74ABTE16246
11-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVER
WITH 3-STATE AND OPEN-COLLECTOR OUTPUTS
SCBS227G – JULY 1993 – REVISED JUNE 2001
4–19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
LOAD CIRCUIT
S2
7 V
Open
500 Ω
SWITCHING TABLE LOADS
t
PLH
/t
PHL
(9A–11A and B port)
t
PLH
/t
PHL
(1A–8A)
t
PLZ
/t
PZL
t
PHZ
/t
PZH
(except 1A–8A)
S1
Up
Up
Up
Up
t
PLH
t
PHL
Output
Output
Control
(low-level
enabling)
Output
Waveform 1
S2 at 7 V
(see Note B)
Output
Waveform 2
S2 at Open
(see Note B)
V
OL
V
OH
t
PZL
t
PZH
t
PLZ
t
PHZ
1.5 V1.5 V
1.5 V 1.5 V
3.5 V
3 V
0 V
1.5 V
1.5 V
V
OH
V
OL
0 V
1.5 V
V
OL
+ 0.3 V
1.5 V
V
OH
– 0.3 V
≈0 V
3 V
Input
C
L
= 50 pF
(see Note A)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
500 Ω
S1
94 Ω
3.65 V
2 nF
S2
Open
7 V
7 V
Open
R
X
R
X
= 13, 26, or 56 Ω
EXTENDED
SWITCHING TABLE LOADS
t
PLH
/t
PHL
/t
sk
(A port)
t
PLH
/t
PHL
/t
sk
(B port)
t
t
(A port) (see Note E)
t
t
(B port) (see Note F)
Down
Up
Down
Up
X
Open
X
Open
S1 S2
NOTES: A. C
L
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, Z
O
= 50 Ω, t
r
≤ 2.5 ns, t
f
≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. t
t
is measured between 1 V and 2 V of the output waveform.
F. t
t
is measured between 10% and 90% of the output waveform.Figure 1
Figure 2. Load Circuit and Voltage Waveforms