IDT IDT74CBTLV3257

IDT74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE
QUAD 2:1MUX/DEMUX
BUS SWITCH
IDT74CBTLV3257
FEATURES:
DESCRIPTION:
−
−
−
−
−
−
−
The CBTLV3257 is a quad 2:1 multiplexer/demultiplexer. The low onstate resistance of the switch allows connections to be made with minimal
propagation delay.
Functionally equivalent to QS3257
5Ω Switch Connection between Two Ports
Isolation Under Power-Off Conditions
Over-voltage tolerant
Latch-up performance exceeds 100ma
VCC = 2.3V - 3.6V, normal range
ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
Available in SSOP, QSOP, and TSSOP packages
−
The select (S) input controls the data flow. The multiplexers/demultiplexers
are enabled when the output-enable (OE) input is low.
To ensure the high-impedance state during power up or power down,
OE should be tied to VCC through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking capability of the driver.
APPLICATIONS:
−
3.3V High Speed Bus Switching, Multiplexing, and Bus Isolation
SIMPLIFIED SCHEMATIC, EACH
SWITCH
FUNCTIONAL BLOCK DIAGRAM
1A
1B1
SW
SW
2A
2B1
SW
SW
3A
A
2B2
B
3B1
SW
SW
4A
1B2
3B2
4B1
SW
SW
FROM ENABLE
CIRCUITRY
4B2
S
OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
SEPTEMBER 2001
1
c
2001 Integrated Device Technology, Inc.
DSC-5744/1
IDT74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
1
S
ABSOLUTE MAXIMUM RATINGS (1)
16
V CC
1B1
2
15
OE
1B2
3
14
4B1
1A
4
4B2
2B1
5
SO16-7 13
SO16-9
SO16-10 12
2B2
6
11
3B1
2A
7
10
3B2
GND
8
9
Symbol
VCC
Description
Supply Voltage Range
Max.
–0.5 to 4.6
VI
Input Voltage Range
Unit
V
–0.5 to 4.6
V
Continuous Channel Current
128
mA
IIK
Input Clamp Current, VI/O < 0
–50
mA
TSTG
Storage Temperature
–65 to +150
°C
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or
any other conditions above those indicated in the operational sections
of this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect reliability.
4A
3A
FUNCTION TABLE (1)
QSOP/ SSOP/ TSSOP
TOP VIEW
Inputs
OE
S
Function
L
L
L
H
A Port = B1 Port
A Port = B2 Port
H
X
Disconnect
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
OPERATING CHARACTERISTICS, TA = 25°C
Symbol
VCC
Supply Voltage
VIH
High-Level Control Input Voltage
VIL
Low-Level Control Input Voltage
TA
Parameter
Test Conditions
VCC = 2.3V to 2.7V
Min.
2.3
Max.
3.6
Unit
1.7
—
V
VCC = 2.7V to 3.6V
2
—
VCC = 2.3V to 2.7V
—
0.7
VCC = 2.7V to 3.6V
—
0.8
−40
+85
Operating Free-Air Temperature
NOTE:
1. All unused control inputs of the device must be held at VCC or GND to ensure proper operation.
2
V
V
°C
IDT74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: TA = – 40°C to +85°C
Symbol
VIK
Parameter
Control Inputs, Data I/O
Test Conditions
VCC = 3V, II = −18mA
II
Control Inputs, Data I/O
VCC = 3.6V, VI = VCC or GND
IOZ
Data I/O
Min.
—
Typ. (1)
—
Max.
– 1.2
Unit
V
—
—
±1
µA
VCC = 3.6V, VO = 0 or 3.6V, switch disabled
—
—
20
µA
IOFF
VCC = 0, VI or VO = 0 to 3.6V
—
—
50
µA
ICC
VCC = 3.6V, IO = 0, VI = VCC or GND
—
—
10
µA
∆ICC (2)
Control Inputs
VCC = 3.6V, One input at 3V, Other inputs at VCC or GND
—
—
300
µA
CI
Control Inputs
VI = 3V or 0
—
4
—
pF
CIO(OFF)
A port
VO = 3V or 0, OE = VCC = 3.3V
—
13
—
pF
—
6
—
IO = 64mA
—
5
8
IO = 24ma
—
5
8
VI = 1.7V
IO = 15mA
—
27
40
VI = 0
IO = 64mA
—
5
7
IO = 24mA
—
5
7
IO = 15mA
—
10
15
B port
Max at VCC = 2.3V
VI = 0
Typ at VCC = 2.5V
RON (3)
VCC = 3V
VI = 2.4V
Ω
NOTES:
1. Typical values are at VCC = 3.3V, +25°C ambient.
2. The increase in supply current is attributable to each input that is at the specified voltage level rather than VCC or GND.
3. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined
by the lower of the voltages of the two (A or B) terminals.
SWITCHING CHARACTERISTICS
VCC = 2.5V ± 0.2V
Symbol
tPD(1)
tSEL
tEN
tDIS
tEN
tDIS
Parameter
Propagation Delay
A to B or B to A
Select Time
S to A or B
Enable Time
S to B
Disable Time
S to B
Enable Time
OE to A or B
Disable Time
OE to A or B
VCC = 3.3V ± 0.3V
Min.
−
Max.
0.15
Min.
−
Max.
0.25
Unit
ns
1
6.1
1
5.3
ns
1
6.1
1
5.3
ns
1
4.8
1
4.5
ns
1
5.6
1
5
ns
1
5.5
1
5.5
ns
NOTE:
1. The 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).
3
IDT74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
PROPAGATION DELAY/ SELECT TIME
TEST CONDITIONS
Symbol
VLOAD
VCC(1)= 3.3V ± 0.3V
6
VCC(2)= 2.5V ± 0.2V
2 x Vcc
Unit
V
VIH
3
Vcc
V
VT
1.5
VCC/2
V
VLZ
300
150
mV
VHZ
300
150
mV
CL
50
30
pF
SAME PHASE
INPUT TRANSITIO N
V IH
VT
0V
DISABLE
ENABLE
500 Ω
CONTROL
INPUT
GND
tPZL
V OUT
D.U.T.
RT
tPHL
V OH
VT
VOL
ENABLE AND DISABLE TIMES
Open
Pulse
Generator
tPLH
V LOAD
V CC
V IN
t PHL
OPPO SITE PHASE
INPUT TRANSITIO N
TEST CIRCUITS FOR ALL OUTPUTS
(1, 2)
tPLH
OUTPUT
V IH
VT
0V
OUTPUT
SW ITCH
NORMALLY
CLOSED
LOW
tPZH
OUTPUT SW ITCH
NORMALLY
OPEN
HIGH
500 Ω
CL
tPLZ
V IH
VT
0V
V LOAD/2
V LOAD/2
VT
V OL + V LZ
V OL
t PHZ
VT
V OH
V OH - V HZ
0V
0V
DEFINITIONS:
NOTE:
CL = Load capacitance: includes jig and load capacitance.
RT = Termination resistance: should be equal to ZOUT of the pulse
generator.
1. Diagram shown for Input Control Enable-LOW and Input Control
Disable-HIGH.
NOTES:
1. Pulse Generator for all pulses: Rate ≤ 10MHz; tF ≤ 2.5ns, tR ≤ 2.5ns
2. Pulse Generator for all pulses: Rate ≤ 10MHz; tF ≤ 2ns, tR ≤ 2ns
SWITCH POSITION
Test
tPLZ/tPZL
Switch
VLOAD
tPHZ/tPZH
GND
tPD
Open
tSEL
Open
4
IDT74CBTLV3257
LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT
XX
CBTLV
Temp. Range
XXX
XX
Device Type
Package
CORPORATE HEADQUARTERS
2975 Stender Way
Santa Clara, CA 95054
Q
PY
PG
Quarter-Size Small Outline Package (SO16-7)
Shrink Small Outline Package (SO16-9)
Thin Shrink Small Outline Package (SO16-10)
3257
Low-Voltage Quad 2:1 Mux/Demux Bus Switch
74
–40°C to +85°C
for SALES:
800-345-7015 or 408-727-6116
fax: 408-492-8674
www.idt.com
5
for Tech Support:
[email protected]
(408) 654-6459