Datasheet IDT74163244PA, IDT74163244PF, IDT74163244PV Datasheet (Integrated Device Technology Inc)

Integrated Device Technology, Inc.

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

FEATURES:

• Bus switches provide zero delay paths

• Extended commercial range of –40°C to +85°C

• Low switch on-resistance:
FST163xxx – 7Ω

• TTL-compatible input and output levels

• ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)

• Available in SSOP, TSSOP and TVSOP

• Pin-compatible with FCT16244/FCT162244T

COMMERCIAL TEMPERATURE RANGE FEBRUARY 1997

1997 Integrated Device Technology, Inc. DSC-3615/-

1

IDT74FST163244

ADVANCE INFORMATION

16-BIT BUS SWITCH

1OE

1A1
1A2

1

A3

1

A4

1

B1

1

B2

1

B3

1

B4

2

OE

2A1
2A2

2

A3

2

A4

2

B1

2

B2

2

B3

2

B4

3OE

3A1
3A2

3

A3

3

A4

3

B1

3

B2

3

B3

3

B4

4

OE

4A1
4A2

4

A3

4

A4

4

B1

4

B2

4

B3

4

B4

PIN DESCRIPTION

3615 drw 01

3615 tbl 01

Pin Names Description

X

OE

Output Enable Inputs (Active LOW)

XAx A Port Bits
XBx B Port Bits

DESCRIPTION:

The FST163244 belongs to IDT's family of Bus switches.
Bus switch devices perform the function of connecting or
isolating two ports without providing any inherent current sink
or source capability. Thus they generate little or no noise of
their own while providing a low resistance path for an external
driver. These devices connect input and output ports through
an n-channel FET. When the gate-to-source junction of this
FET is adequately forward-biased the device conducts and
the resistance between input and output ports is small. With­out adequate bias on the gate-to-source junction of the FET,
the FET is turned off, therefore with no VCC applied, the device
has hot insertion capability.

The low on-resistance and simplicity of the connection
between input and output ports reduces the delay in this path
to close to zero.

FUNCTIONAL BLOCK DIAGRAM

2

IDT74FST163244
16-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

(1)

FUNCTION TABLE

Inputs

x

OE

Outputs

L Connect A to B

H Disconnect A from B

1B1

GND

1B3

V

CC

GND

3B2

GND

V

CC

GND

1B2

1

B

4

2

B

1

2

B

2

2

B

3

2

B

4

3

B

1

3

B

3

3

B

4

4

B

1

4

B

3

4

B

4

4

B

2

1

A

1

1

A

2

GND

1A3

1

A

4

V

CC

2

A

1

2

A

2

2

A

3

2

A

4

3

A

1

3

A

2

3

A

3

3

A

4

V

CC

4

A

1

4

A

3

4

A

4

4

A

2

GND

GND

GND

3

OE

2

OE

39

29

30

31

32

33

34

35

36

37

38

25

26

27

28

48
47

41

42

43

44

45

46

40

1
2
3
4
5
6
7
8
9
10

12
13
14
15
16
17
18
19
20

11

21
22
23
24

SSOP/

TSSOP/TVSOP

TOP VIEW

SO48-1
SO48-2
SO48-3

1

OE

4

OE

3615 drw 02

3615 tbl 04

Symbol Description Max. Unit

V

TERM

(2)

Terminal Voltage with Respect
to GND

–0.5 to +7.0 V

T

STG

Storage Temperature –65 to +150°C

I

OUT

Maximum Continuous Channel
Current

128 mA

3615 tbl 02

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 condiitions for extended
periods may affect reliability.

2. VCC, Control and Switch terminals.

CAPACITANCE

(1)

Symbol Parameter Conditions

(2)

Typ. Unit

CIN Control Input Capacitance 4 pF
CI/O

Switch Input/Output
Capacitance

Switch Off

pF

3615 tbl 03

NOTES:

1. Capacitance is characterized but not tested

2. TA = 25°C, f = 1MHz, VIN = 0V, VOUT = 0V

IDT74FST163244
16-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE

3

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = –40°C to +85°C, VCC = 5.0V ±10%

NOTES:

1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.

2. Typical values are at VCC = 5.0V, +25°C ambient.

3. Not more than one output should be tested at one time. Duration of the test should not exceed one second.

4. Measured by voltage drop between ports at indicated current through the switch.

POWER SUPPLY CHARACTERISTICS

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

∆ICC Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.
V

IN = 3.4V

(3)

— 0.5 1.5 mA

ICCD Dynamic Power Supply

Current

(4)

VCC = Max.
Outputs Open

VIN = VCC
VIN = GND

—3040µA/

MHz/
Enable Pin Toggling
50% Duty Cycle

Switch

IC Total Power Supply Current

(6)

VCC = Max.
Outputs Open
4 Enable Pins Toggling

VIN = VCC
VIN = GND

— 4.8 6.4 mA

(16 Switches Toggling)
fi = 10MHz
50% Duty Cycle

VIN = 3.4
V

IN = GND

— 5.3 7.9

NOTES:

1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.

2. Typical values are at VCC = 5.0V, +25°C ambient.

3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND.

4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.

5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.

6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fiN)
ICC = Quiescent Current
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fi = Input Frequency
N = Number of Switches Toggling at fi
All currents are in milliamps and all frequencies are in megahertz.

3615 tbl 05

3615 tbl 06

Symbol Parameter Test Conditions

(1)

Min. Typ.

(2)

Max. Unit

VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Inputs 2.0 — — V
VIL Input LOW Voltage Guaranteed Logic LOW for Control Inputs — — 0.8 V
II H Input HIGH Current VCC = Max. VI = VCC ——±1µA
II L Input LOW Voltage VI = GND — — ±1
IOZH High Impedance Output Current VCC = Max. VO = VCC ——±1µA
IOZL (3-State Output pins) VO = GND — — ±1
IOS Short Circuit Current VCC = Max., VO = GND

(3)

— 300 — mA
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V
RON Switch On Resistance

(4)

VCC = Min., VIN = 0.0V — 5 7 Ω
ION = 12mA
VCC = Min., VIN = 2.4V — 10 15 Ω

ION = 8mA
IOFF Input/Output Power Off Leakage VCC = 0V, VIN or VO ≤ 4.5V — — ±1 µA
ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.1 3 µA

4

IDT74FST163244
16-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE

SWITHCING CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = –40°C to +85°C, VCC = 5.0V ±10%

Symbol Description Condition

(1)

Min.

(2)

Typ. Max. Unit

tPLH
tPHL

Data Propagation Delay
A to B, B to A

(3,4)

CL = 50pF

R

L = 500Ω

— — 0.25 ns

tPZH
tPZL

Switch Turn on Delay
xOE to xBx

1.5 — 6.5 ns

tPHZ
tPLZ

Switch Turn off Delay
xOE to xBx

1.5 — 7 ns

|QCI| Charge Injection, Typical

(5,7)

— 1.5 — pC

|QDCI| Charge Injection, Typical

(6,7)

— 0.5 —

3615 tbl 07

NOTES:

1. See test circuit and waveforms.

2. Minimum limits guaranteed but not tested.

3. This parameter is guaranteed by design but not tested.

4. The bus switch contributes no propagation 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 2.5ns for 50pF load. Since this time is constant and much smaller than the rise/fall times of typical driving signals,
it adds very little propagation delay to the system. Propagation delay on 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.

5. Measured at switch turn off, load = 50 pF in parallel with 10 MΩ scope probe, VIN = 0.0 volts.

6. Measured at switch turn off through bus multiplexer, (e.g.- A to 1B = >A to 2B), load = 50 pF in parallel with 10 MΩ scope probe, VIN at A = 0.0 volts. Charge
injection is reduced because the injection from the turn off of the A to 1B switch is compensated by the turn on of the A to 2B switch.

7. Characterized parameter. Not 100% tested.

IDT74FST163244
16-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE

5

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

SWITCH POSITION

SET-UP, HOLD AND RELEASE TIMES

PULSE WIDTH

PROPAGATION DELAY

ENABLE AND DISABLE TIMES

Test

Switch

Disable Low

Enable Low

Closed

All Other Tests

Open

Open Drain

DEFINITIONS:

CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse

Generator.

Pulse

Generator

R

T

D.U.T.

V

CC

V

IN

C

L

V

OUT

50pF

500

Ω

500

Ω

7.0V

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V

0V

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

t

SU

t

H

t

REM

t

SU

t

H

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

t

W

1.5V

1.5V

SAME PHASE

INPUT TRANSITION

3V

1.5V
0V

1.5V

V

OH

t

PLH

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

3V

1.5V
0V

t

PLH

t

PHL

t

PHL

V

OL

CONTROL

INPUT

3V

1.5V
0V

3.5V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH
CLOSED

SWITCH
OPEN

V

OL

0.3V

0.3V

t

PLZ

t

PZL

t

PZH

t

PHZ

3.5V

0V

1.5V

1.5V

ENABLE DISABLE

V

OH

PRESET

CLEAR

CLOCK ENABLE

ETC.

NOTES:

1. Diagram shown for input Control Enable-LOW and input Control Disable­HIGH

2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns

3615 lnk 03

3615 lnk 04

3615 lnk 05

3615 lnk 06

3615 lnk 07

3615 lnk 08

6

IDT74FST163244
16-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE

Integrated Device Technology, Inc.

2975 Stender Way, Santa Clara, CA 95054-3090 Telephone: [phone] FAX [phone]

Integrated Device Technology, Inc. reserves the right to make changes to the specifications in this data sheet in order to improve design or performance and to supply the best possible product.

ORDERING INFORMATION

IDT XX

Temp. Range

XX

Device Type

X

Package

74 –40°C to +85°C

PV
PA
PF

163244

Shrink Small Outline Package (SO48-1)
Thin Shrink Small Outline Package (SO48-2)
Thin Very Small Outline Package (SO48-3)

16-Bit Bus Switch

FST

3615 drw 08