INTEGRATED CIRCUITS
CBT3384
10-bit bus switch with 5-bit output enables
and Schottky undershoot protection
Product specification
Supersedes data of 1999 Oct 10
2000 Jan 28
Philips
Semiconductors
Philips Semiconductors
Product specification
10-bit bus switch with 5-bit output enables
and Schottky undershoot protection
CBT3384
FEATURES
•
5
Ω
switch connection between two ports
•
TTL compatible control input and output levels
•
Undershoot protection included to prevent shoot through level
changes
DESCRIPTION
The CBT3384 provides ten bits of high-speed TTL-compatible bus
switching. The low on-state resistance of the switch allows
connections to be made with minimal propagation delay.
The CBT3384 device is organized as two 5-bit with separate
output-enable (OE) inputs. When OE is low, the switch is on and
port A is connected to B. When OE is high, the switch is open and
high-impedance state exists between the two ports.
The CBT3384 is characterized for operation from 0°C to 85°C.
•
Latch-up protection exceeds 500 mA per JESD78
•
ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
QUICK REFERENCE DATA
SYMBOL
t
PLH
t
PHL
C
IN
C
OUT
I
CCZ
PARAMETER
Propagation delay
An to Yn
Input capacitance
Output capacitance
Total supply current
CONDITIONS
T
amb
= 25°C; GND = 0 V
C
L
= 50 pF; V
CC
= 5 V
V
I
= 0 V or V
CC
Outputs disabled; V
O
= 0 V or V
CC
Outputs disabled; V
CC
=5.5 V
TYPICAL
250
4
10
3
UNIT
ps
pF
pF
µA
ORDERING INFORMATION
PACKAGES
24-Pin Plastic TSSOP Type I
TEMPERATURE RANGE
–40°C to +85°C
ORDER CODE
CBT3384 PW DH
DWG NUMBER
SOT403-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER
1, 13
3, 4, 7, 8, 11
SYMBOL
1OE, 2OE
1A1–1A5
2A1–2A5
1B1–1B5
2B1–2B5
GND
V
CC
NAME AND FUNCTION
Output enables
Inputs
Inputs
Outputs
Outputs
Ground (0 V)
Positive supply voltage
1OE
1B1
1A1
1A2
1B2
1B3
1A3
1A4
1B4
1B5
1A5
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Vcc
2B5
2A5
2A4
2B4
2B3
2A3
2A2
2B2
2B1
2A1
2OE
14, 17, 18, 21, 22
2, 5, 6, 9, 10
15, 16, 19, 20, 23
12
24
SA00502
2000 Jan 28
2
853-2187 23060
Philips Semiconductors
Product specification
10-bit bus switch with 5-bit output enables
and Schottky undershoot protection
CBT3384
LOGIC SYMBOL
3
1A1
2
1B1
FUNCTION TABLE
INPUTS
1OE
L
2OE
L
H
L
H
OUTPUTS
1A, 1B
1A = 1B
1A = 1B
Z
Z
2A, 2B
2A= 2B
Z
2A = 2B
Z
11
1A5
10
1B5
L
H
H
1
1OE
14
2A1
15
2B1
H = High voltage level
L = Low voltage level
Z = High impedance “off ” state
22
2A5
23
2B5
13
2OE
SA00504
ABSOLUTE MAXIMUM RATINGS
1, 2
SYMBOL
V
CC
I
IK
V
I
I
SW
T
stg
PARAMETER
DC supply voltage
DC input diode current
DC input voltage
3
DC output diode current
Storage temperature range
V
O
< 0
CONDITIONS
RATING
–0.5 to +7.0
–50
–1.2 to +7.0
±128
–65 to 150
UNIT
V
mA
V
mA
°C
NOTES:
1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
IH
V
IL
T
amb
DC supply voltage
High-level input voltage
Low-level Input voltage
Operating free-air temperature range
0
PARAMETER
LIMITS
Min
4.5
2.0
0.8
+85
Max
5.5
UNIT
V
V
V
°C
2000 Jan 28
3
Philips Semiconductors
Product specification
10-bit bus switch with 5-bit output enables
and Schottky undershoot protection
CBT3384
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
V
IK
I
I
I
CC
∆I
CC
C
I
C
I(OFF)
r
on3
V
P
I
UCP
PARAMETER
Input clamp voltage
Input leakage current
Quiescent supply current
2
Additional supply current per input pin
2
Control pins
Power-off leakage current
On-resistance
Pass voltage
Undershoot static current protection
TEST CONDITIONS
V
CC
= 4.5 V; I
I
= –18 mA
V
CC
= 5.5 V; V
I
= GND or 5.5 V
V
CC
= 5.5 V; I
O
= 0, V
I
= V
CC
or GND
V
CC
= 5.5 V, one input at 3.4 V, other inputs at V
CC
or GND
V
I
= 3.0 V or 0
V
O
= 3.0 V or 0, OE = V
CC
V
CC
= 4.5 V; V
I
= 0 V; I
I
= 64 mA
V
CC
= 4.5 V; V
I
= 0 V; I
I
= 30 mA
V
CC
= 4.5 V; V
I
= 2.4 V; I
I
= –15 mA
V
I
= V
CC
= 5.0 V; I
O
= –100
µA
V
CC
= 5.0 V, I
B
= 400
µA;
OE = 5.0 V; V
B
≥
3.0 V
3.4
4
10
5
5
10
3.6
8
7
7
15
3.9
V
mA
Ω
T
amb
= –40°C to +85°C
Min
Typ
1
Max
–1.2
±1
3
2.5
V
µA
µA
mA
pF
pF
UNIT
NOTES:
1. All typical values are at V
CC
= 5 V, TA = 25°C
2. This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND
3. Measured by the voltage drop between the A and the B terminals at the indicated current through the switch. On-state resistance is
determined by the lowest voltage of the two (A or B) terminals.
AC CHARACTERISTICS
GND = 0 V; t
R;
C
L
= 50 pF
LIMITS
SYMBOL
t
pd
t
en
t
dis
PARAMETER
Propagation delay
1
Output enable time
to High and Low level
Output disable time
from High and Low level
FROM
(INPUT)
A or B
OE
OE
TO
(OUTPUT)
B or A
A or B
A or B
1.0
1.0
V
CC
= +5.0 V
±0.5
V
Min
Max
.25
5.7
5.2
ns
ns
ns
UNIT
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).
LIMITS
SYMBOL
Tpd
TPZH
TPHZ
TPZL
TPLZ
PARAMETER DESCRIPTION
Propagation delay (see Note 1)
Output enable time to High level
Output enable time from High level
Output enable time to Low level
Output enable time from Low level
1.6
1.7
2.3
2.5
3.4
3.3
4
4.5
–40° C/+85° V
CC
= 5 V,
±0.5
V
MIN.
MEAN
MAX.
250
5.6
5.5
6
6.6
pS
nS
nS
nS
nS
UNIT
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); at +25°C.
2000 Jan 28
4
Philips Semiconductors
Product specification
10-bit bus switch with 5-bit output enables
and Schottky undershoot protection
CBT3384
AC WAVEFORMS
V
M
= 1.5 V, V
IN
= GND to 3.0 V
3V
7V
1.5V
INPUT
0V
t
PLH
t
PHL
V
OH
1.5V
OUTPUT
V
OL
1.5V
TEST
t
pd
S1
open
7V
open
1.5V
From Output
Under Test
C
L
= 50 pF
500
Ω
S1
Open
GND
500
Ω
TEST CIRCUIT AND WAVEFORMS
Load Circuit
SA00028
t
PLZ
/t
PZL
Waveform 1. Input (An) to Output (Yn) Propagation Delays
t
PHZ
/t
PZH
3V
Output Control
(Low-level
enabling
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
0V
3.5V
1.5 V
t
PHZ
V
OH
– 0.3V
1.5 V
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.
DEFINITIONS
Load capacitance includes jig and probe capacitance;
C
L
=
see AC CHARACTERISTICS for value.
SA00012
t
PLZ
V
OL
+ 0.3V
V
OL
V
OH
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.
SA00029
Waveform 2. 3-State Output Enable and Disable Times
2000 Jan 28
5
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