Fairchild FXLH1T45 Service Manual

tm

FXLH1T45 Low Voltage 1-Bit Bi-directional Level Translator with Conﬁgurable Voltage Supplies and Bushold Data Inputs

April 2007

FXLH1T45 Low Voltage 1-Bit Bi-directional Level Translator with Conﬁgurable Voltage Supplies and Bushold Data Inputs

Features

Bi-directional interface between any 2 levels from 1.1V

■

to 3.6V

■

Fully conﬁgurable: Inputs track V Non-preferential power-up sequencing; either V

■

may be powered-up ﬁrst Outputs remain in 3-STATE until active V

■

reached

■

Outputs switch to 3-STATE if either V Power off protection

■

Bushold on data inputs eliminates the need for external pull-up/pull-down resistors

Control input (T/R

■

) levels are referenced to V

voltage

■

Packaged in the MicroPak 6 (1.0mm x 1.45mm)

ESD protections exceeds:

■

– 4kV HBM ESD

(per JESD22-A114 & Mil Std 883e 3015.7)

– 8kV HBM I/O to GND ESD

(per JESD22-A114 & Mil Std 883e 3015.7)

– 1kV CDM ESD (per ESD STM 5.3)

– 200V MM ESD (per JESD22-A115 & ESD STM5.2)

CC

level

CC

level is

CC

is at GND

CCA

CC

General Description

The FXLH1T45 is a single bit conﬁgurable dual-voltage supply translator designed for both uni-directional and bi-directional voltage translation between two logic levels. The device allows translation between voltages as high as 3.6V to as low as 1.1V. The A port tracks the V

level, and the B port tracks the V

CCA

level. This

CCB

allows for bi-directional voltage translation over a variety of voltage levels: 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V.

The device remains in 3-STATE until both V active levels allowing either V

to be powered-up ﬁrst.

CC

s reach

CC

Internal power down control circuits place the device in 3-STATE if either V

The Transmit/Receive (T/R

is removed.

CC

) input determines the direction of data ﬂow through the device. The FXLH1T45 is designed so that the control pin (T/R V

.

CCA

) is supplied by

Ordering Information

Package

Order Number

FXLH1T45L6X MAC06A Yes 6-Lead MicroPak, 1.0mm Wide 5k Units on Tape and Reel

MicroPak™ is a trademark of Fairchild Semiconductor Corporation.

Number Pb-Free Package Description Supplied As

H =

FXLH1T45 Low Voltage 1-Bit Bi-directional Level Translator with Conﬁgurable Voltage Supplies and Bushold Data Inputs

Functional Diagram

V

CCA

A

T/R

Connection Diagram

1

V

CCA

2

GND

34

A

6

5

(Top Through View)

Pin Assignment

Pin Number Terminal Name

1V

2 GND

3A

4B

5 T/R

6V

V

CCB

V

CCB

T/R

B

CCA

CCB

Function Table

Inputs (T/R

B

HIGH Logic Level

L = LOW Logic Level

) Outputs

L Bus B Data to Bus A

H Bus A Data to Bus B

Power-Up/Power-Down Sequencing

FXL translators offer an advantage in that either V may be powered up ﬁrst. This beneﬁt derives from the chip design. When either V

is at 0V, outputs are in a

CC

HIGH-Impedance state. To ensure that bus contention, excessive currents, or oscillations do not occur, a proper power-up sequence is recommended.

The recommended power-up sequence is the following:

1. Apply power to either V

2. Apply power to the T/R

.

CC

input (Logic HIGH for A-to-B operation; Logic LOW for B-to-A operation) and to the respective data inputs (A Port or B Port). This may occur at the same time as Step 1.

3. Apply power to other V

CC

.

The recommended power-down sequence is the following:

1. Remove power from either V

2. Remove power from other V

CC

.

CC

Pin Descriptions

Pin Names Description

T/R

A Side A Input or Output

B Side B Input or Output

V

CCA

V

CCB

Tr ansmit/Receive Input

Side A Power Supply

Side B Power Supply

±

−

) −

−

+

−

+

<

−

<

>

−

+

−

±

− 65 °

±

− 40 °

∆

=

FXLH1T45 Low Voltage 1-Bit Bi-directional Level Translator with Conﬁgurable Voltage Supplies and Bushold Data Inputs

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.

Symbol Parameter Rating

V

CCA

I

OH

T

, V

V

I

IK

I

OK

I

CC

STG

CCB

I

O

/

I

OL

Supply Voltage

DC Input Voltage

I/O Port A I/O Port B Control Input (T/R

Output Voltage

)

(1)

Outputs 3-STATE Outputs Active (A Outputs Active (B

DC Input Diode Current @ V

)

n

I

DC Output Diode Current @

V

0V

O

V

O

CC

DC Output Source/Sink Current

DC V

or Ground Current per Supply Pin

CC

Storage Temperature Range

0V

0.5V to + 4.6V

0.5V to V

50mA / + 50mA

0.5V

CCA

0.5V

CCB

50mA

50mA 50mA

100mA

C to + 150 ° C

Recommended Operating Conditions

(2)

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings.

Symbol Parameter Rating

V

or V

CCA

CCB

T

A

t

V Maximum Input Edge Rate V

/

Notes:

1. I

Absolute Maximum Rating must be observed.

O

2. All unused inputs

Power Supply Operating 1.1V to 3.6V

Input Voltage

Por t A Por t B Control Input (T/R

Output Current in I

OH

)

/I

with V

OL

3.0V to 3.6V

2.3V to 2.7V

1.65V to 1.95V

1.4V to 1.65V

1.1V to 1.4V

Free Air Operating Temperature

and I/O pins

must be held at V

CCI

CC @

1.1V to 3.6V 10ns/V

CCA/B

or GND.

0.0V to 3.6V

0.0V to V

24mA 18mA

6mA 2mA

0.5mA

C to + 85 ° C

CCA

DC Electrical Characteristics

Symbol Parameter Conditions

V

High Level Input

IH

Low Level Input

V

IL

VOH High Level Output

Low Level Output

V

OL

I

(3)

Voltage

(3)

Voltage

(4)

Voltage

(4)

Voltage

Input Leakage Current Control Pins

Data Inputs A

, B

n

Control Pin T/R (Referenced to V

Data Inputs An, B

Control Pin T/R (Referenced to V

IOH = −100µA 1.1–3.6 1.1–3.6 V

= −12mA 2.7 2.7 2.2 – –

I

OH

= −18mA 3.0 3.0 2.4 – –

I

OH

= −24mA 3.0 3.0 2.2 – –

I

OH

= −6mA 2.3 2.3 2.0 – –

I

OH

= −12mA 2.3 2.3 1.8 – –

I

OH

= −18mA 2.3 2.3 1.7 – –

I

OH

= −6mA 1.65 1.65 1.25 – –

I

OH

= −2mA 1.4 1.4 1.05 – –

I

OH

= −0.5mA 1.1 1.1 0.75 x V

I

OH

IOL = 100µA 1.1–3.6 1.1–3.6 – – 0.2 V

= 12mA 2.7 2.7 – – 0.4

I

OL

= 18mA 3.0 3.0 – – 0.4

I

OL

= 24mA 3.0 3.0 – – 0.55

I

OL

=12mA 2.3 2.3 – – 0.4

I

OL

= 18mA 2.3 2.3 – – 0.6

I

OL

= 6mA 1.65 1.65 – – 0.3

I

OL

= 2mA 1.4 1.4 – – 0.35

I

OL

= 0.5mA 1.1 1.1 – – 0.3 x V

I

OL

VI = V

or GND 1.1–3.6 3.6 – – ±1.0 µA

CCA

n

CCA

n

CCA

V

CCI

(V) V

CCO

(V)

Min. Typ. Max. Units

2.7–3.6 1.1–3.6 2.0 – – V

2.3–2.7 1.6 – –

1.65–2.3 0.65 x V

1.4–1.65 0.65 x V

1.1–1.4 0.9 x V

––

CCI

––

CCI

––

CCI

2.7–3.6 1.1–3.6 2.0 – –

)

2.3–2.7 1.6 – –

1.65–2.3 0.65 x V

1.4–1.65 0.65 x V

1.1–1.4 0.9 x V

CCA

––

CCA

––

CCA

––

2.7–3.6 1.1–3.6 – – 0.8 V

2.3–2.7 – – 0.7

1.65–2.3 – – 0.35 x V

1.4–1.65 – – 0.35 x V

1.1–1.4 – – 0.1 x V

2.7–3.6 1.1–3.6 – – 0.8

)

2.3–2.7 – – 0.7

1.65–2.3 – – 0.35 x V

1.4–1.65 – – 0.35 x V

1.1–1.4 – – 0.1 x V

–0.2 – – V

CC0

––

CC0

CCI

CCA

CC0

FXLH1T45 Low Voltage 1-Bit Bi-directional Level Translator with Conﬁgurable Voltage Supplies and Bushold Data Inputs

Fairchild FXLH1T45 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual