Datasheet IDT74CBTLV16292 Datasheet (IDT)

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IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH

INDUSTRIAL TEMPERATURE RANGE

LOW-VOLTAGE 12-BIT 1:2
MUX / DEMUX BUS SWITCH
WITH INTERNAL PULL DOWN
RESISTORS

FEA TURES:

ΩΩ

•5

Ω A/B bi-directional switch

ΩΩ

• Isolation Under Power-Off Conditions

• Make-before-break feature

• Over-voltage tolerant

• Internal 500

• 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, TSSOP, and TVSOP packages

APPLICA TIONS:

• 3.3V High Speed Bus Switching and Bus Isolation

• Resource sharing

FUNCTIONAL BLOCK DIAGRAM

1A

ΩΩ

Ω pull-down resistor to GND

ΩΩ

2

SW

54

1B1

IDT74CBTLV16292

DESCRIPTION:

The CBTLV16292 is a single 12-bit multiplexing / demultiplexing bus
switch, which provides high speed switching. This device has very low ON
resistance, resulting in under 250ps propagation delay throught the switch.
The demultiplexer side has a 500Ω resistor (R pulldown) termination to
GND to eliminate floating nodes.

When the select (S) input is low, the A port is connected to the B1 port,
and the R pulldown is connected to the B2 port. Similarly, when the S input
is high, A port is connected to B2 port and the R pulldown is connected to
B1 port.

SIMPLIFIED SCHEMATIC, EACH
SWITCH

12A

RPULLDOWN

RPULLDOWN

AB

SW

27

1

S

SW

RPULLDOWN

RPULLDOWN

SW

53

1B2

30

12B1

SELECT CONTROL

CIRCUITRY

30

12B2

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

INDUSTRIAL TEMPERATURE RANGE

2002 Integrated Device Technology, Inc. DSC-5892/5c

AUGUST 2002

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IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH

INDUSTRIAL TEMPERATURE RANGE

PIN CONFIGURATION

1

S

1A1

2A1

3A1

GND

4A1

5A1

6A1

7A1

8A1

GND

9A1

10A1

11A1

12A1

2
3

NC

4
5

NC

6
7

NC

8
9
10

NC

11
12

NC

13
14

NC

15
16

NC

CC

17

V

18
19

NC

20
21

NC

22
23

NC

24
25

NC

26
27

NC

28

SSOP/ TSSOP/ TVSOP

TOP VIEW

56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29

NC
NC
1B1
1B2
2B1
2B2
3B1
GND
3B2
4B1
4B2
5B1
5B2
6B1
6B2

7B1
7B2
8B1
GND
8B2
9B1
9B2
10B1
10B2
11B1
11B2
12B1
12B2

ABSOLUTE MAXIMUM RATINGS

(1)

Symbol Description Max. Unit

VCC Supply Voltage Range –0.5 to 4.6 V

VI Input Voltage Range –0.5 to 4.6 V

Continuous Channel Current 12 8 mA

IIK Input Clamp Current, VI/O < 0 –50 mA

STG Storage Temperature Range –65 to +150 °C

T

NOTE:

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.

PIN DESCRIPTION

Pin Names Description

S Select Input
xAx Port A Inputs or Outputs
xBx Port B Inputs or Outputs

FUNCTION TABLE

Input

S Operation

L A Port = B1 Port

H A Port = B2 Port

NOTE:

1. H = HIGH Voltage Level
L = LOW Voltage Level

(1)

RPULLDOWN = B2 Port

RPULLDOWN = B1 Port

OPERATING CHARACTERISTICS

(1)

Symbol Parameter Test Conditions Min. Max. Unit

VCC Supply Voltage 2.3 3.6 V

VIH High-Level Control Input Voltage VCC = 2.3V to 2.7V 1.7 — V

VCC = 2.7V to 3.6V 2 —

VIL Low-Level Control Input Voltage VCC = 2.3V to 2.7V — 0.7 V

VCC = 2.7V to 3.6V — 0.8

TA Operating Free-Air Temperature –4 0 +85 °C

NOTE:

1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.

2

IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 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 Parameter Test Conditions Min. Typ.

VIK Control Inputs, Data I/O VCC = 3V, II = –18mA — — –1.2 V

II Control Inputs VCC = 3.6V, VI = VCC or GND — — ±1 µA

IOFF VCC = 0V, VI or VO = 0V or 3.6V — — 10 µA

ICC VCC = 3.6V, IO = 0, VI = VCC or GND — — 10 µA

(2)

∆ICC

Control Inputs VCC = 3.6V, one input at 3V, other inputs at VCC or GND — — 300 µA

CI Control Inputs VI = 3.3V or 0 — 3.5 — pF

CIO(OFF) A port or B port VO = 3.3V or 0 — 22.5 — pF

CC = 2.3V VI = 0 IO = 64mA — 5 8

CC = 2.5V IO = 24mA — 5 8

VI = 1.7V IO = 15mA — 11 40 Ω

RON

Max. at V
Typ. at V

(3)

VI = 0 IO = 64mA — 3 7

VCC = 3V IO = 24mA — 3 7

VI = 2.4V IO = 15mA — 7 15

NOTES:

1. Typical values are at 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.

(1)

Max. Unit

SWITCHING CHARACTERISTICS

VCC = 2.5V ± 0.2V VCC = 3.3V ± 0.3V

Symbol Parameter Min. Max. Min. Max. Unit

(1)

tPD

(2)

tPD

tEN Output Enable Time 1 5.6 1 5 n s

tDIS Output Disable Time 1 5 1 4.5 ns

(3,4)

tMB/B

NOTES:

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).

2. The condition to measure this propagation delay is by observing the change of voltage on the A port introduced by static fields equal to 3V or 0V for 3.3V±0.3V or VCC or 0 for

2.5V±0.2V on B1 and B2 ports to get the required transition.

3. The make-before-break time is the duration between the make and break, during transition from one selected port to another.

4. This parameter is guaranteed by design but not production tested.

Propagation Delay — 0.15 — 0.25 ns
A to B or B to A
Propagation Delay 2.5 7.1 2.5 6.7 ns
S to A

S to B

S to B
Make-Before-Break Time 0 2 0 2 ns

3

IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH

TEST CIRCUITS AND WA VEFORMS

TEST CONDITIONS

Symbol VCC

VLOAD 6 2 x Vcc V

VIH 3 Vcc V

VT 1.5 Vcc / 2 V
VLZ 300 150 mV
VHZ 300 150 mV

CL 50 30 pF

(1)

= 3.3V±0.3V VCC

(2)

= 2.5V±0.2V Unit

SAME PHASE

INPUT TRANSITION

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

INDUSTRIAL TEMPERATURE RANGE

tPLH

tPLH

tPHL

tPHL

Propagation Delay

VIH
VT
0V

OH

V
VT
VOL

VIH
VT
0V

VCC

500Ω

(1, 2)

Pulse
Generator

VIN

D.U.T.

RT

VOUT

500Ω

CL

Test Circuits for All Outputs

DEFINITIONS:

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

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 Switch

tPLZ/tPZL VLOAD

tPHZ/tPZH GND

t

PD Open

VLOAD
Open

GND

ENABLE

CONTROL

INPUT

tPZL

OUTPUT

NORMALLY

OUTPUT

NORMALLY

LOW

SWITCH

CLOSED

SWITCH

OPEN

HIGH

NOTES:

1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.

2. Disable Low waveform applies to outputs that are LOW, except when disabled by
the output control S.

VLOAD/2

VT

tPZH

VT
0V

DISABLE

tPLZ

tPHZ

VIH
VT
0V

VLOAD/2

OL + VLZ

V
VOL

VOH
VOH -VHZ

0V

Enable and Disable Times

4

IDT74CBTLV16292
LOW-VOLTAGE 12-BIT 1:2 MUX / DEMUX BUS SWITCH

ORDERING INFORMATION

IDT XX

CBTLV

XXX XX

Device TypeTemp. Range

Package

INDUSTRIAL TEMPERATURE RANGE

PV
PA
PF

16292

74

Shrink Small Outline Package
Thin Shrink Small Outline Package
Thin Very Small Outline Package

Low-Voltage 12-Bit Mux / Demux Bus Switch
with Internal Pull Do wn R esi stors

–40°C to +85°C

CORPORATE HEADQUARTERS for SALES: for Tech Support:

2975 Stender Way 800-345-7015 or 408-727-6116 [e-mail]
Santa Clara, CA 95054 fax: [phone] [phone]

www.idt.com

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