ETC PI5C3257CQ

PI5C3257C
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Quad 2:1 Mux/Demux BusSwitch
with –2V Undershoot Protection
Product Features
Product Description
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Pericom Semiconductor’s PI5C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
The PI5C3257C is a Quad 2:1 multiplexer/demultiplexer with threestate outputs that is pinout and function compatible with the
PI74FCT257T. Inputs can be connected to outputs with low on
resistance (5ohms) with no additional ground bounce noise or
propagation delay.
Near zero propagation delay
5ohms switches connect inputs to outputs
Direct bus connection when switches are ON
Undershoot Protection to –2V (Data Inputs Only)
Pin compatible with 74 series 257 logic devices
Packages available:
– 16-pin 150 mil wide plastic QSOP (Q)
– 16-pin 173 mil wide plastic TSSOP (L)
16-Pin Product Configuration
Logic Block Diagram
IA0
IA1
IB0
IB1
IC0
IC1
ID0
ID1
E
S
S
1
16
VCC
IA0
2
15
E
IA1
3
14
ID0
YA
4
13
ID1
IB0
5
16-Pin
L,Q 12
IB1
6
11
IC0
YB
7
10
IC1
GND
8
9
YC
YD
Product Pin Description
Pin Name
YA
YB
YC
YD
Truth Table(1)
De s cription
IAN- IDN
Data Inputs
S
Select Inputs
E
Enable
YA- YD
Data Outputs
E
S
YA
YB
YC
YD
Function
H
X
Hi- Z
Hi- Z
Hi- Z
Hi- Z
Disable
GND
Ground
L
L
IA0
IB0
IC0
ID0
S=0
Vcc
Power
L
H
IA1
IB1
IC1
ID1
S=1
NC
No Connect
Note: 1. H = High Voltage Level
L = Low Voltage Level
1
PS8513
02/21/01
PI5C3257
Quad 2:1 Mux/Demux BusSwitch
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with –2V Undershoot Protection
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ............................................................. –65°C to +150°C
Ambient Temperature with Power Applied ............................. –40°C to +85°C
Supply Voltage to Ground Potential (Inputs & Vcc Only) ....... –0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) .... –0.5V to +7.0V
DC Input Voltage ..................................................................... –0.5V to +7.0V
DC Output Current ............................................................................... 120mA
Power Dissipation ................................................................................... 0.5W
Note:
Stresses greater than those listed under 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.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±5%)
Parameters Description
Test Conditions(1)
Min.
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
–0.5
IIH
Input HIGH Current
IIL
Input LOW Current
IOZH
High Impedance Output Current 0 ≤I, Y ≤VCC
VIK
Clamp Diode Voltage
VUP
Undershoot Protection Voltage
RON
Switch On Resistance(4)
(3)
Typ(2)
Max.
Units
V
0.8
V
VCC = Max., VIN = VCC
±1
µA
VCC = Max., VIN = GND
±1
µA
±1
µA
VCC = Min., IIN = –18mA
–1.8
V
Max Inputs, Undershoot Pulse Duration <25ns
–2.0
V
7
15
ohms
VCC = Min., VIN = 0.0V,
VCC = Min., VIN = 2.4V,
ION = 48mA
ION = 15mA
4
8
Capacitance (TA= 25°C, f = 1 MHz)
Parameters(5)
Description
Test Conditions
CIN
COFF
Input Capacitance
IN/YN Capacitance, Switch Off
CON
IN/YN Capacitance, Switch On
Typ
Max.
Units
VIN = 0V
VIN = 0V
6
6
pF
pF
VIN = 0V
14
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, TA = 25°C ambient and maximum loading.
3. On 1AN and 1BIN (Data Input) pins only.
4. Measured by the voltage drop between I and Y pin at indicated current through the switch. ON resistance is determined
by the lower of the voltages on the two (I,Y) pins.
5. This parameter is determined by device characterization but is not production tested.
2
PS8513
02/21/01
PI5C3257
Quad 2:1 Mux/Demux BusSwitch
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with –2V Undershoot Protection
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
Min.
Typ(2)
Max.
Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
100
µA
∆ICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
2.5
mA
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs only); I and Y pins do not contribute to ICC.
Switching Characteristics over Operating Range
PI5C3257C
Com.
Description
Conditions(1)
CL = 50pF
RL = 500ohms
tPZH
tPZL
Propagation Delay(2,3)
IN to YN
Bus Select Time
SN to YN
Bus Disable Time
E to YN
tPHZ
Bus Disable Time
tPLZ
E to YN
Parameters
tIY
t SY
Min
Max
Units
0.25
7.0
30.0
7.0
30.0
1.5
8.8
ns
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. The bus switch contributes no propagational delay other than the RC delay of the
ON resistance of the switch and the load capacitance. The time constant for the switch
alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller
than the rise/fall times of typical driving signals, it adds very little propagational
delay to the system. Propagational delay of the bus switch when used in a system is
determined by the driving circuit on the driving side of the switch and its interaction
with the load on the driven side.
Applications Information
Logic Inputs
The logic control inputs can be driven up to +5.5V regardless of the supply voltage. For example, given a 5.0V supply, the control or
select pins may be driven low to 0V and high to 5.5V. Driving the control or select pins Rail-toRail R minimizes power consumption.
Power -Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC before applying
signals to the input/output or control pins.
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PS8513
02/21/01
PI5C3257
Quad 2:1 Mux/Demux BusSwitch
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with –2V Undershoot Protection
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16 -TSSOP (L) Package Mechanical
16
.169
.177
4.3
4.5
1
.193
.201
4.9
5.1
.004
.008
.047
max.
1.20
0.45 .018
0.75 .030
SEATING
PLANE
.002
.006
.007
.012
.0256
BSC
0.65
0.09
0.20
.252
BSC
6.4
0.05
0.15
0.19
0.30
X.XX DENOTES CONTROLLING
X.XX DIMENSIONS IN MILLIMETERS
16 - QSOP (Q) Package Mechanical
16
.150
.157
3.81
3.99
.015 x 45° 0.38
1
.007
.010
.189
.197
4.80
5.00
0.178
0.254
0.41 .016
1.27 .050
.008
0.203 REF
.228
.244
5.79
6.19
.053 1.35
.069 1.75
SEATING
PLANE
.008
.012
0.203
0.305
.025
BSC
0.635
.004 0.101
.010 0.254
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Ordering Information
Part
Pin-Package
Te mpe rature
PI5C3257CL
16 TSSOP (L)
–40°C to +85°C
PI5C3257CQ
16 QSOP (Q)
–40°C to +85°C
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
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PS8513
02/21/01