Datasheet IDT74FST16163213PV, IDT74FST16163213PF, IDT74FST16163213PA Datasheet (Integrated Device Technology)

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 – 4Ω

• 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

COMMERCIAL TEMPERATURE RANGE FEBRUARY 1997

1997 Integrated Device Technology, Inc. DSC-3684/-

1

IDT74FST163213

PRODUCT PREVIEW

24-BIT BUS EXCHANGE
SWITCH

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 ther 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.

The FST163213 provides four 12-bit TTL-compatible ports
that support 2 way bus exchange. The S0-2 pins control the
bus exchange and switch enable functions.

DESCRIPTION:

The FST163213 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

FUNCTIONAL BLOCK DIAGRAM

1A1

S

0

S

1

1

B

1

1 of 12 Channels

Flow Control

1B2

1

A

2

S

2

3684 drw 01

Pin Names I/O Description

A1, A2
B1, B2

I/O Buses A1, A2, B1, B2

S0-2 I Control Pins for Mux and Switch

Enable Functions

PIN DESCRIPTION

3684 tbl 01

2

IDT74FST163213
24-BIT BUS EXCHANGE SWITCH COMMERCIAL TEMPERATURE RANGE

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

(1)

Symbol Description Max. Unit

VTERM

(2)

Terminal Voltage with Respect
to GND

–0.5 to +7.0 V

TSTG Storage Temperature –65 to +150 °C
IOUT Maximum Continuous Channel

Current

128 mA

3684 lnk 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

NOTES:

1. Capacitance is characterized but not tested

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

3684 lnk 03

SSOP/

TSSOP/TVSOP

TOP VIEW

5

6
7
8
9
10

1
2

3
4

54
53
52

51
50
49

48
47

46
45

4A2

1

A1

1

A2

2

A1

2

A2

3

A1

3

A2

GND

4A1

1

B1

1

B2

2

B1

2

B2

3

B1

3

B2

4

B1

S1
S2

5A1

11
12

55

56

5A2

4

B2

5

B1

17

18
19
20
21

22

13
14

15
16

42
41
40

39
38
37

36
35

34
33

9A2

6

A2

7

A1

7

A2

6

A1

VCC

8

A1

GND

8A2

9

A1

6

B2

7

B1

7

B2

8

B1

GND

8B2

9

B1

9

B2

5

B2

6

B1

SO56-1
SO56-2
SO56-3

10A1

23
24

43

44

10A2

10

B1

10

B2

25
26

32
31

30
29

11A2

11

A111B1

11

B2

12A1

27
28

12A2

12

B1

12

B2

S0

GND

3684 drw 02

FUNCTION TABLE

S

2

S

1

S

0

A

1

A

2

Function

L L L Z Z Disconnect
LLHB

1

ZA

1

to B

1

LHLB

2

ZA

1

to B

2

LHHZB

1

A

2

to B

1

HLLZB

2

A

2

to B

2

HLHA

2

&

B

2

ZA

1

to A2 and B

2

HHLB

1

B

2

A1 to B1, A2 to B

2

HHHB

2

B

1

A1 to B2, A2 to B

1

3684 tbl 04

DT74FST163213
24-BIT BUS EXCHANGE 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%

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 — 4 7 Ω
ION = 64mA
VCC = Min. VIN = 0.0V — 4 7 Ω
ION = 30mA
VCC = Min. VIN = 2.4V — 10 15 Ω
ION = 15mA

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

3684 tbl 05

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 testes 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.

4

IDT74FST163213
24-BIT BUS EXCHANGE SWITCH COMMERCIAL TEMPERATURE RANGE

POWER SUPPLY CHARACTERISTICS

3684 tbl 06

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.

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
Enable Pins Toggling

VIN = VCC
VIN = GND

— 7.2 9.6 mA

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

VIN = 3.4
V

IN = GND

— 7.7 11.1

SWITCHING 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

tBX Switch Multiplex Delay

S to A, B

1.5 — 6.5 ns

tPZH
tPZL

Switch Turn on Delay
S to A, B

1.5 — 6.5 ns

tPHZ
tPLZ

Switch Turn off Delay
S to A, B

(3)

1.5 — 7 ns

|QCI| Charge Injection, Typical

(5,7)

— 1.5 — pC

|QDCI| Charge Injection, Typical

(6,7)

— 0.5 —

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.- A1 to B1 = >A1 to B2), 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 A1 to B1 switch is compensated by the turn on of the A1 to B2 switch.

7. Characterized parameter. Not 100% tested.

3684 tbl 07

DT74FST163213
24-BIT BUS EXCHANGE SWITCH COMMERCIAL TEMPERATURE RANGE

5

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

SWITCH POSITION

SET-UP, HOLD AND RELEASE TIMES

PULSE WIDTH

Pulse

Generator

R

T

D.U.T.

V

CC

V

IN

C L

V

OUT

50pF

500Ω

500Ω

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

tSU

tH

tREM

tSU

tH

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

tW

1.5V

1.5V

SAME PHASE

INPUT TRANSITION

3V

1.5V
0V

1.5V

V

OH

tPLH

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

3V

1.5V
0V

tPLH tPHL

tPHL

VOL

CONTROL

INPUT

3V

1.5V
0V

3.5V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH
CLOSED

SWITCH
OPEN

VOL

0.3V

0.3V

t

PLZtPZL

tPZH tPHZ

3.5V

0V

1.5V

1.5V

ENABLE DISABLE

VOH

PRESET

CLEAR

CLOCK ENABLE

ETC.

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.

3684 lnk 08

3684 drw 03

3684 drw 04

3684 drw 05

3684 drw 06

3684 drw 07

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

6

IDT74FST163213
24-BIT BUS EXCHANGE SWITCH COMMERCIAL TEMPERATURE RANGE

3684 drw 08

IDT XX

Temp. Range

16 XX

Device Type

X

Package

74 –40°C to +85°C

PV
PA
PF

163213

Shrink Small Outline Package (SO56-1)
Thin Shrink Small Outline Package (SO56-2)
Thin Very Small Outline Package (SO56-3)

24-Bit Bus Exchange Switch

FST

ORDERING INFORMATION