Datasheet IDT74LVCH16245APV, IDT74LVCH16245APF, IDT74LVCH16245APA Datasheet (Integrated Device Technology)

IDT74LVCH16245A

3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

INDUSTRIAL TEMPERATURE RANGE

3.3V CMOS 16-BIT
BUS TRANSCEIVER
WITH 3-STATE OUTPUTS,
5 VOLT TOLERANT I/O AND BUS-HOLD

FEA TURES:

• Typical tSK(o) (Output Skew) < 250ps

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

•VCC = 3.3V ± 0.3V, Normal Range

•VCC = 2.7V to 3.6V, Extended Range

• CMOS power levels (0.4

• All inputs, outputs, and I/O are 5V tolerant

• Available in SSOP, TSSOP, and TVSOP packages

DRIVE FEA TURES:

• High Output Drivers: ±24mA

• Reduced system switching noise

APPLICA TIONS:

• 5V and 3.3V mixed voltage systems

• Data communication and telecommunication systems

µµ

µ W typ. static)

µµ

IDT74LVCH16245A

DESCRIPTION:

This 16-bit bus transceiver is built using advanced dual metal CMOS
technology. This high-speed, low power transceiver is ideal for asynchro­nous communication between two busses (A and B). The Direction and
Output Enable controls are designed to operate this device as either two
independent 8-bit transceivers or one 16-bit transceiver. The direction
control pin (DIR) controls the direction of data flow. The output enable pin
(OE) overrides the direction control and disables both ports. All inputs are
designed with hysteresis for improved noise margin.

All pins can be driven from either 3.3V or 5V devices. This feature allows
the use of this device as a translator in a mixed 3.3V/5V supply system.

The LVCH16245A has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.

The LVCH16245A has “bus-hold” which retains the inputs' last state
whenever the input goes to a high impedance. This prevents floating inputs
and eliminates the need for pull-up/down resistors.

FUNCTIONAL BLOCK DIAGRAM

1

1DIR

47

1A1

46

1

A2

44

A3

1

43

A4

1

41

A5

1

40

A6

1

38

A7

1

37

A8

1

24

2DIR

48

1

OE

2

B1

1

3

1

B2

5

1

B3

6

1

B4

8

1

B5

9

1

B6

11

1

B7

12

B8

1

2A1

2

2

2

2

A6

2

2

A7

2

A2

A3

A4

A5

A8

36

35

33

32

30

29

27

26

25

2

OE

13

B1

2

14

2

B2

16

2

B3

17

2

B4

19

2

B5

20

2

B6

22

2

B7

23

B8

2

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

MARCH 1999INDUSTRIAL TEMPERATURE RANGE

© 1999 Integrated Device Technology, Inc. DSC-4596/1

1

IDT74LVCH16245A

3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

INDUSTRIAL TEMPERATURE RANGE

PIN CONFIGURATION

1DIR

1B1

1B2

GND

B3

1
1

B4

CC

V

1

B5
B6

1

GND

1

B7

1

B8

B1

2

2

B2

GND

2
3
4

5
6

7
8
9

10
11

12
13
14
15

481
47
46
45
44

43
42

41

40
39

38
37
36
35

34

1OE
1A1

1A2

GND

A3

1
1

A4

CC

V

1

A5

1

A6

GND

1

A7
A8

1

2

A1

2

A2

GND

ABSOLUTE MAXIMUM RATINGS

Symbol Description Max Unit

VTERM Terminal Voltage with Respect to GND –0.5 to +6.5 V
TSTG Storage Temperature –65 to +150 °C
IOUT DC Output Current –50 to +50 mA
I

IK Continuous Clamp Current, –50 mA

IOK VI < 0 or VO < 0
I

CC Continuous Current through each ±100 mA

ISS VCC or GND

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.

(1)

CAPACITANCE (TA = +25°C, F = 1.0MHz)

Symbol Parameter

CIN Input Capacitance VIN = 0V 4.5 6 pF
COUT Output Capacitance VOUT = 0V 6.5 8 pF
C

I/O I/O Port Capacitance VIN = 0V 6.5 8 pF

NOTE:

1. As applicable to the device type.

(1)

Conditions Typ. Max. Unit

2B3

B4

2

VCC

B5

2
2

B6

GND

B7

2
2B8

DIR

2

16
17

18
19

20
21
22

23
24

SSOP/ TSSOP/ TVSOP

TOP VIEW

33
32

31

30
29
28
27
26
25

2A3
2

A4

VCC

A5

2
2

A6

GND

2

A7

2A8

OE

2

PIN DESCRIPTION

Pin Names Description

xOE Output Enable Inputs (Active LOW)

xDIR Direction Control Input

xAx Side A Inputs or 3-State Outputs
xBx Side B Inputs or 3-State Outputs

NOTE:

1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.

FUNCTION T ABLE (EACH 8-BIT SECTION)

Inputs

xOE xDIR Outputs

L L Bus B Data to Bus A
L H Bus A Data to Bus B

H X Isolation

NOTES:

1. H = HIGH Voltage Level
X = Don’t Care
L = LOW Voltage Level

(1)

(1)

(1)

2

IDT74LVCH16245A

3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

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.

VIH Input HIGH Voltage Level VCC = 2.3V to 2.7V 1.7 — — V

VCC = 2.7V to 3.6V 2 — —

IL Input LOW Voltage Level VCC = 2.3V to 2.7V — — 0.7 V

V

VCC = 2.7V to 3.6V — — 0.8

IH Input Leakage Current VCC = 3.6V VI = 0 to 5.5V — — ±5µA

I
IIL

IOZH High Impedance Output Current VCC = 3.6V VO = 0 to 5.5V — — ±10 µA
IOZL (3-State Output pins)

IOFF Input/Output Power Off Leakage VCC = 0V, VIN or VO ≤ 5.5V — — ±50 µA

VIK Clamp Diode Voltage VCC = 2.3V, IIN = –18mA — –0.7 –1.2 V

VH Input Hysteresis VCC = 3.3V — 100 — mV

I

CCL Quiescent Power Supply Current VCC = 3.6V VIN = GND or VCC —— 10µA

ICCH
ICCZ 3.6 ≤ VIN ≤ 5.5V

(2)

—— 10

∆ICC Quiescent Power Supply Current One input at VCC - 0.6V, other inputs at VCC or GND — — 500 µA

Variation

(1)

Max. Unit

NOTES:

1. Typical values are at VCC = 3.3V, +25°C ambient.

2. This applies in the disabled state only.

BUS-HOLD CHARACTERISTICS

Symbol Parameter

(1)

Test Conditions Min. Typ.

IBHH Bus-Hold Input Sustain Current VCC = 3V VI = 2V – 75 — — µ A
IBHL VI = 0.8V 75 — —
IBHH Bus-Hold Input Sustain Current VCC = 2.3V VI = 1.7V — — — µ A
IBHL VI = 0.7V — — —

IBHHO Bus-Hold Input Overdrive Current VCC = 3.6V VI = 0 to 3.6V — — ±500 µA
IBHLO

NOTES:

1. Pins with Bus-Hold are identified in the pin description.

2. Typical values are at VCC = 3.3V, +25°C ambient.

(2)

Max. Unit

3

IDT74LVCH16245A

3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

INDUSTRIAL TEMPERATURE RANGE

OUTPUT DRIVE CHARACTERISTICS

Symbol Parameter Test Conditions

VOH Output HIGH Voltage VCC = 2.3V to 3.6V IOH = – 0.1mA VCC – 0.2 — V

CC = 2.3V IOH = – 6mA 2 —

V
V

CC = 2.3V IOH = – 12mA 1.7 —

VCC = 2.7V 2.2 —
VCC = 3V 2.4 —
VCC = 3V IOH = – 24mA 2.2 —

OL Output LOW Voltage VCC = 2.3V to 3.6V IOL = 0.1mA — 0.2 V

V

V

CC = 2.3V IOL = 6mA — 0.4

VCC = 2.7V IOL = 12mA — 0.4
VCC = 3V IOL = 24mA — 0.55

NOTE:

1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range.
TA = – 40°C to + 85°C.

(1)

Min. Max. Unit

IOL = 12mA — 0.7

OPERA TING CHARACTERISTICS, VCC = 3.3V ± 0.3V , TA = 25°C

Symbol Parameter Test Conditions Typical Unit

CPD Power Dissipation Capacitance per Transceiver Outputs enabled CL = 0pF, f = 10Mhz 40 pF
CPD Power Dissipation Capacitance per Transceiver Outputs disabled 4

SWITCHING CHARACTERISTICS

(1)

VCC = 2.7V VCC = 3.3V ± 0.3V

Symbol Parameter Min. Max. Min. Max. Unit

tPLH Propagation Delay — 4.7 1 4 ns
tPHL xAx to xBx, xBx to xAx
tPZH Output Enable Time — 6.7 1.5 5.5 ns
tPZL xOE to xAx or xBx
tPHZ Output Disable Time — 7.1 1.5 6.6 ns
tPLZ xOE to xAx or xBx

tSK( o) Output Skew

NOTES:

1. See TEST CIRCUITS AND WAVEFORMS. TA = – 40°C to + 85°C.

2. Skew between any two outputs of the same package and switching in the same direction.

(2)

——— 1ns

4

IDT74LVCH16245A

3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

TEST CIRCUITS AND WAVEFORMS

INDUSTRIAL TEMPERATURE RANGE

TEST CONDITIONS

Symbol VCC

(1)

= 3.3V±0.3V VCC

VLOAD 6 6 2 x Vcc V

VIH 2.7 2.7 Vcc V
VT 1.5 1.5 Vcc / 2 V

VLZ 300 300 150 mV

VHZ 300 300 150 mV

L 50 50 30 pF

C

VIN

(1, 2)

Pulse

Generator

Test Circuit 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.

RT

VCC

D.U.T.

(1)

= 2.7V VCC

VOUT

(2)

= 2.5V±0.2V Unit

500Ω

500Ω

CL

LVC Link

VLOAD
Open
GND

SAME PHASE

INPUT TRANSITION

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

tPLH

tPLH

tPHL

tPHL

VIH
VT
0V

V
VT
VOL

VIH
VT
0V

LVC Link

OH

Propagation Delay

DISABLE

tPLZ

tPHZ

VIH
VT
0V

VLOAD/2
V

VOL
VOH

VOH-VHZ
0V

LVC Link

OL+VLZ

CONTROL

INPUT

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

ENABLE

tPZL

SWITCH

CLOSED

tPZH

SWITCH

OPEN

VLOAD/2

VT

VT
0V

Enable and Disable Times

NOTE:

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

SWITCH POSITION

Test Switch

Open Drain

Disable Low V

Enable Low

Disable High GND

Enable High

All Other Tests Open

INPUT

OUTPUT 1

tPLH1

tSK (x)

OUTPUT 2

tPLH2

tSK(x) = tPLH2 - tPLH1 or tPHL2 - tPHL1

Output Skew - tSK(X)

NOTES:

1. For tSK(o) OUTPUT1 and OUTPUT2 are any two outputs.

2. For tSK(b) OUTPUT1 and OUTPUT2 are in the same bank.

t

PHL1

tSK (x)

tPHL2

LOAD

VIH
VT

0V
V

OH

VT
VOL

VOH
VT

VOL

LVC Link

TIMING

ASYNCHRONOUS

CONTROL

SYNCHRONOUS

CONTROL

LOW-HIGH-LOW

HIGH-LOW-HIGH

5

DATA

INPUT

t

SU

INPUT

tSU

Set-up, Hold, and Release Times

PULSE

tW

PULSE

Pulse Width

tREM

tH

VIH
VT

tH

0V
VIH

VT
0V

VIH
VT
0V

VIH
VT
0V

LVC Link

VT

VT

LVC Link

IDT74LVCH16245A

3.3V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

ORDERING INFORMATION

INDUSTRIAL TEMPERATURE RANGE

IDT

Temp. Range

XX

LVC

XXX

FamilyBus-Hold

XXXX

XX

PackageDevice Type

PV
PA
PF

245A

16

H

74

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

16-Bit Bus Transceiver with 3-State Outputs

Double-Density, ±24mA

Bus-hold

-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

6