CBT6800 Datasheet, PDF (5/8 Pages) NXP Semiconductors – 10-bit bus switch with precharged outputs for live insertion

Philips Semiconductors
10-bit bus switch with precharged outputs
for live insertion
Product specification
CBT6800
AC CHARACTERISTICS
GND = 0 V; C_L = 50 pF; t_r = t_f ≤ 2.5 ns
SYMBOL
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LIMITS
V_CC = +5.0 V ±0.5 V
Min
Max
UNIT
t_pd
Propagation delay¹
A or B
B or A
.25
ns
t_PZH
T_PZL
BIASV = GND
BIASV = 3 V
ON
A or B
2.4
7.7
3.0
8.3
ns
t_PHZ
T_PLZ
BIASV = GND
BIASV = 3 V
ON
A or B
1.0
5.3
3.1
7.8
ns
NOTE:
1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on-state
resistance of the switch and a load capacitance of 50 pF, when driven by an ideal voltage source (zero output impedance).
AC WAVEFORMS
V_M = 1.5 V, V_IN = GND to 3.0 V
3V
INPUT
1.5V
t_PLH
1.5V
t_PHL
0V
V_OH
OUTPUT
1.5V
1.5V
V_OL
SA00028
Waveform 1. Waveforms Showing the Input (An) to Output (Yn)
Propagation Delays
Output Control
(Low-level
enabling
1.5 V
3V
1.5 V
t_PZL
Output
Waveform 1
S1 at 7 V
(see Note)
t_PZH
Output
Waveform 2
S1 at Open
(see Note)
1.5 V
1.5 V
t_PLZ
t_PHZ
0V
3.5V
V_OL + 0.3V
V_OL
V_OH
V_OH – 0.3V
0V
Note:
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.
SA00029
Waveform 2. Waveforms Showing the 3-State Output Enable
and Disable Times
TEST CIRCUIT AND WAVEFORMS
From Output
Under Test
C_L = 50 pF
500 Ω
500 Ω
7V
S1
Open
GND
Load Circuit
TEST
S1
t_pd
t_PLZ/t_PZL
t_PHZ/t_PZH
open
7V
open
DEFINITIONS
C_L = Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
SA00012
NOTES:
1. 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.
2. The outputs are measured one at a time with one transition per
measurement.
1999 Oct 28
5