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IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES INDUSTRIAL TEMPERATURE RANGE
FEBRUARY 2000
1999 Integrated Device Technology, Inc. DSC-5723/-c
IDTQS32862
INDUSTRIAL TEMPERATURE RANGE
QUICKSWITCH® PRODUCTS
HIGH-SPEED CMOS 10-BIT
BUS SWITCH WITH ACTIVE
HIGH AND LOW ENABLES
DESCRIPTION:
The QS32862 provides a set of ten high speed CMOS, TTL Compatible
bus switches. The switches are controlled by independent active Low
enable (BE) and High enable (BE) controls.
The QS32862 includes internal 25Ω series termination resistors to
reduce reflection noise in high speed applications. When closed, the switch
acts as the source (series) termination for the driver connected to it. The
QS32862 is ideal for switching digital buses as well as hot-plugging, hot-
docking, and voltage translation.
The QS32862 is characterized for operation at -40°C to +85°C.
A0
A9
B0
B9
BE
BE
FUNCTIONAL BLOCK DIAGRAM
FEATURES:
− Enhanced N channel FET with no inherent diode to Vcc
− Undershoot clamp diodes on all switch and control inputs
− Active low and high enable control
− 25Ω resistors for low noise
− Available in SOIC and QSOP packages
APPLICATIONS
− Hot-swapping, hot-docking
− Voltage translation (5V to 3.3V)
− Power conservation
− Capacitance reduction and isolation
− Applications requiring Active-High enabling
− Clock gating
− Bus isolation
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES
PIN CONFIGURATION
24
23
22
21
20
19
18
17
16
15
14
13
BE
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
GND
VCC
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
1
2
3
4
5
6
7
8
9
10
11
12
BE
SO24-2
SO24-8
SOIC/ QSOP
TOP VIEW
ABSOLUTE MAXIMUM RATINGS (1)
Symbol Description Max. Unit
VTERM(2) Supply Voltage to Ground – 0.5 to +7 V
VTERM(3) DC Switch Voltage VS– 0.5 to +7 V
VTERM(3) DC Input Voltage VIN – 0.5 to +7 V
VAC AC Input Voltage (pulse width ≤20ns) -3 V
IOUT DC Output Current 120 mA
PMAX Maximum Power Dissipation 0.5 W
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 othe r conditions ab ove those i ndicated in the operational sectio ns
of this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affec t reliability.
2. Vc c Terminals .
3. All termi nal s except Vcc.
CAPACITANCE
(TA = +25OC, f = 1.0MHz, VIN = 0V, VOUT = 0V)
Pins Typ. Max. (1) Unit
Control Inputs 3 5 pF
Quickswitch Channels (Switch OFF) 5 7 pF
NOTE:
1. This parameter is guaranteed but not production tes t ed.
PIN DESCRIPTION
Pin Names I/O Description
BE I Active High Bus Enable
BE I Active High Bus Enable
A0 – A9I/O Bus A
B0 – B9I/O Bus B
FUNCTION TABLE(1)
BE BE A0 – A9Function
L L Hi-Z Disconnect
L H Hi-Z Disconnect
HL
B
0
– B9Connect
H H Hi-Z Disconnect
NOTE:
1. H
=
HIGH V ol t a
g
e Level
L
=
LOW Volta
g
e Level
Z
=
Hi
g
h-impedence
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IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES INDUSTRIAL TEMPERATURE RANGE
RON
(ohms)
VIN
(Volts)
TYPICAL ON RESISTANCE vs VIN AT VCC = 5V
80
70
60
50
40
30
20
10
00.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 10%
Symbol Parameter Test Conditions Min. Typ.(1) Max. Unit
VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Pins 2 — — V
VIL Input LOW Voltage Guaranteed Logic LOW for Control Pins — — 0.8 V
IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ Vcc — ±0.01 ±1 µA
IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ Vcc, Switches OFF — ±0.01 ±1 µA
RON Switch ON Resistance Vcc = Min., VIN = 0V, ION = 30mA 20 28 40 Ω
RON Switch ON Resistance Vcc = Min., VIN = 2.4V, ION = 15mA 20 35 48 Ω
VPPass Voltage (2) VIN = VCC = 5V, IOUT = -5µA3.7 4 4.2 V
NOTES:
1. Typical values are at V CC = 5. 0V, TA = 25°C.
2. Pas s volt age i s guaranteed but not production t ested.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Typ. (2) Max. Unit
ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or Vcc, f = 0 0.2 3 µA
∆ICC Power Supply Current per Control Input HIGH VCC = Max., VIN = 3.4V(3), f = 0 — 2.5 mA
ICCD Dynamic Power Supply Current per MHz(4) VCC = Max., A and B pins open,
BE, BE inputs
Toggling at 50% Duty Cycle
— 0.25 mA/MHz
NOTES:
1. For conditi ons shown as M i n. or Max. , use the appropriat e values s pecified under DC E l ectric al Characteris t i cs.
2. Typical values are at V CC = 5. 0V, TA = 25°C ambi ent.
3. Per TLL driven i nput (VIN = 3.4V, control inputs only ). A and B pins do not cont ri bute to ∆Icc.
4. This current applies to the control inputs only and represent s the current required to s witch internal capacitanc e at the specified frequenc y. The A
and B inputs generate no significant A C or DC currents as they t ransition. This parameter is guarant eed but not producti on tested.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
TA = -40°C to +85°C, VCC = 5.0V ± 10%
CLOAD = 50pF, RLOAD = 500Ω unless otherwise noted.
Symbol
Parameter Min. (1) Typ. Max. Unit
tPLH
tPHL Data Propagation Delay (2,3)
A to B or B to A — — 1.25 ns
tPZL
tPZH Switch Turn-on Delay
BE or BE to A to B 1.5 — 75 ns
tPLZ
tPHZ Switch Turn-off Delay (2)
BE or BE to A to B 1.5 — 5.5 ns
NOTES:
1. Mini m um s are guaranteed but not producti on t ested.
2. This param et er i s guaranteed but not producti on t ested.
3. The time const ant for the switch al one i s of the order of 1.25ns f or CL = 50pF. The bus swit c h contribut es no propagation delay other than t he RC
delay of t he ON resist ance of the switch and the load capac i tance. S i nce this time constant i s much sm al l er t han the rise and fall times of typical
driving s i gnal s, it adds very li t tle propagation del ay to the system. Propagation delay of the bus switch, when used in a system, is determined by the
driving c i rcuit on t he dri v i ng side of t he switch and i ts int eraction with the load on the dri ven side.
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IDTQS32862
HIGH-SPEED CMOS 10-BIT BUS SWITCH WITH ACTIVE ENABLES INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDTQS XXXXX XX
Package
D evice Type
Blank Industrial (-40°C to +85°C)
Sm all Outline IC (SO 24-2)
Quarter-S ize O utline Package (SO24-8)
SO
Q
32862 High Speed C M O S 10-Bit B us Sw itch w ith
Active H igh and Low E nables
X
Process
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