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LXS0204/LXS0204L: Ultra-Low Voltage, Auto-Direction Sensing, 4-Bit Level Shifter

Description

The LXS0204/LXS0204L is a 4-bit, configurable, dual-supply, bi-directional, auto-sensing translator that does not require a directional control pin. The A and B ports are designed to track two different power supply rails, VCCA and VCCB respectively. The VCCA supply rail is configurable from 0.72V to 1.98V. The VCCB supply rail is configurable from 1.65V to 5.5V. This allows voltage logic signals on the VCCA side to be translated into higher or equal value voltage logic signals on the VCCB side.

The translator has integrated 10kΩ pullup resistors on the Port A lines and Port B lines for up to 150 pF loading. The integrated pullup resistors are used to pull up the I/O lines to either VCCA or VCCB.

Port A and OE are referenced to VCCA and port B is referenced to VCCB. A LOW level at pin OE causes all I/Os to be a high-impedance OFF-state. Power-off protection is implemented to prevent the current from passing through the device when it is powered down.

The LXS0204/LXS0204L is an excellent match for open-drain applications such as the I2C communication bus. For push-pull applications, the LXS0204L disables the internal pullup resistors during logic-low and re-enables the internal pullup resistors during logic-high, thereby reducing static power consumption.

Features

For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact Diodes Incorporated or your local Diodes representative.

Applications

Pin Assignments

Transparent Top View

VCCB A1 VCCA A2 B2 B3 OE A3 B4 GND A4
1 2 3
A B1
B
C
D

U-WLB1014-12 (Type JC)

Pin Descriptions

VCCA Power A-port supply voltage. 0.72V ≤ VCCA ≤ 1.98V. VCCB Power B-port supply voltage. 1.65V ≤ VCCB ≤ 5.5V. A1 I/O Input/output A. Referenced to VCCA. A2 I/O Input/output A. Referenced to VCCA. A3 I/O Input/output A. Referenced to VCCA. A4 I/O Input/output A. Referenced to VCCA. B1 I/O Input/output B. Referenced to VCCB. B2 I/O Input/output B. Referenced to VCCB. B3 I/O Input/output B. Referenced to VCCB. B4 I/O Input/output B. Referenced to VCCB. OE Input Output Enable (Active High). Pull OE Low to place all outputs in 3-state mode. GND GND Ground.
Pin Number (Type JC) Pin Name Type Description
A2
B2
A3
B3
C3
D3
A1
B1
C1
D1
C2
D2

Functional Block Diagram

A block diagram shows the internal architecture of the LXS0204/LXS0204L. It illustrates four channels, each with an OE input controlling the output state. The diagram shows inputs A1, A2, A3, A4 and outputs B1, B2, B3, B4. The OE signal is connected to all channels.

Absolute Maximum Ratings

mA
Symbol Parameter Rating Unit
TSTG Storage Temperature -65 to +150 °C
VCCA DC Supply Voltage Port A -0.5 to +2.5 V
VCCB DC Supply Voltage Port B -0.5 to +6.5 V
VEN Enable Control DC Input Voltage -0.3 to +6.5 V
VIOA Port A DC Input Voltage -0.5 to +2.5 V
VIOB Port B DC Input Voltage -0.5 to +6.5 V
IO Continuous Output Current 40

Note: Stresses greater than those listed under Absolute Maximum Ratings can cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings for extended periods can affect device reliability.

Recommended Operating Conditions

Symbol Parameter Min Typ Max Unit
VCCA VCCA Positive DC Supply Voltage 0.72 - 1.98 V
VCCB VCCB Positive DC Supply Voltage 1.65 - 5.5 V
VEN Enable Control Pin Voltage GND - 5.5 V
VIOA Port A I/O Pin Voltage GND - VCCA V
VIOB Port B I/O Pin Voltage GND - VCCB V
At/Av Input Transition Rise or Fall Time (A or B port Push-Pull Driving, VCCA = 0.72V to 1.98V, VCCB = 1.65V to 5.5V) - 10 - ns/V
At/Av Input Transition Rise or Fall Time (OE, VCCA = 0.72V to 1.98V, VCCB = 1.65V to 5.5V) - 10 - ns/V
TA Operating Temperature Range -40 - +85 °C

DC Electrical Characteristics

This section details the DC electrical characteristics of the LXS0204/LXS0204L, including input/output voltages, supply currents, and leakage currents under various conditions.

Symbol Parameter Test Conditions VCCA VCCB Min Typ Max Unit
VIHB B Port Input HIGH Voltage 0.72V to 1.98V 1.65V to 5.5V - VCCB*0.7 - V
VILB B Port Input LOW Voltage 0.72V to 1.98V 1.65V to 5.5V - - 0.15 V
VIHA A Port Input HIGH Voltage 0.72V to 1.98V 1.65V to 5.5V - VCCA*0.7 - V
VILA A Port Input LOW Voltage 0.72V to 1.98V 1.65V to 5.5V - - 0.13 V
VIHOE Control Pin Input HIGH Voltage 0.91V to 1.98V 1.65V to 5.5V - VCCA*0.65 - V
VILOE Control Pin Input LOW Voltage 0.72V to 0.9V 1.65V to 5.5V - VCCA*0.7 - V
VOHB B Port Output HIGH Voltage B port source current = -10μΑ 0.72V to 1.98V 1.65V to 5.5V - VCCB*0.8 - V
VOLB B Port Output LOW Voltage B port sink current = 1mA 0.72V to 1.98V 1.65V to 5.5V - - 0.3 V
VOHA A Port Output HIGH Voltage A port source current = -10μΑ 0.72V to 1.98V 1.65V to 5.5V - VCCA*0.8 - V
VOLA A Port Output LOW Voltage A port sink current = 1mA 0.72V to 1.98V 1.65V to 5.5V - - 0.3 V
IQVCB VCCB Supply Current VIA = VOA = VCCA, VIB = VOB = 1.98V, floating 0.72V to 1.98V 1.65V to 5.5V 0 -1 - μΑ
IQVCA VCCA Supply Current VIA = VOA = VCCA, VIB = VOB = floating 0.72V to 1.98V 1.65V to 5.5V - 10 - μΑ
ILA Port A Input Mode LOW Current (LXS0204L) OE = VCCA, VIAX = 0, VOBX = floating 0.72V to 1.98V 1.65V to 5.5V - 4.7 - μΑ
ILB Port B Input Mode LOW Current (LXS0204L) OE = VCCA, VIBX = 0, VOAX = floating 0.72V to 1.98V 1.65V to 5.5V - ±1 - μΑ
IOZ I/O Tri-State Output Mode Leakage Current Port A 0V to 1.98V 0 to 5.5V - - ±2.8 μΑ
IOFF Power-Off Leakage Current Port A 0 - - ±2 μΑ
RPU Pullup Resistors I/O Port A 0.72V to 1.98V 1.65V to 5.5V 10 - - kΩ
RPU Pullup Resistors I/O Port B 0.72V to 1.98V 1.65V to 5.5V 10 - - kΩ

Note: All units are production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design.

AC Electrical Characteristics

This section provides detailed AC electrical characteristics for the LXS0204/LXS0204L, including propagation delays, rise/fall times, and maximum data rates under various supply voltage and load conditions.

Symbol Parameter Test Conditions VCCA = 1.8V VCCA = 3.3V VCCA = 5.0V Unit
VCCB = 3.3V VCCB = 5.0V VCCB = 5.0V
Min Max Min Max Min Max
tPHL-A-B Propagation Delay Push-pull driving 5.1 - 5.7 - 6.8 - ns
Open-drain driving (LXS0204) 4.5 - 4.7 - 6.9 - ns
Open-drain driving (LXS0204L) - 4.5 - 7.9 - 11.9 ns
Push-pull driving 7.4 - 4.1 - 3.7 - ns
tPLH-A-B Propagation Delay Open-drain driving (LXS0204) 38.7 - 24.4 - 19.1 - ns
Open-drain driving (LXS0204L) 27.1 - 23.0 - 21.2 - ns
Push-pull driving 4.0 - 4.5 - 5.8 - ns
Open-drain driving (LXS0204) 3.6 - 4.1 - 4.5 - ns
tPHL-B-A Propagation Delay Open-drain driving (LXS0204L) 3.7 - 4.6 - 5.0 - ns
Push-pull driving 6.7 - 0.4 - 0.3 - ns
tPLH-B-A Propagation Delay Open-drain driving (LXS0204) 0.3 - 0.2 - 0.1 - ns
Open-drain driving (LXS0204L) 0.3 - 0.1 - 0.1 - ns
ten Enable Time - 200 - 200 - 200 ns
tdis Disable Time - 230 - 230 - 230 ns
tRB B Port Rise Time Push-pull driving 1.08 9.1 0.46 7.6 - - ns
Open-drain driving (LXS0204) 0.56 106 0.44 58 - - ns
tFB B Port Fall Time Open-drain driving (LXS0204L) 0.56 106 0.44 58 - - ns
Push-pull driving 2.1 16.2 2.8 16.2 - - ns
TRA A Port Rise Time Open-drain driving (LXS0204) 2.1 16.2 2.7 16.2 - - ns
Open-drain driving (LXS0204L) 3.5 132 3.3 95 - - ns
tFA A Port Fall Time Push-pull driving 1.9 6 1.7 13.3 - - ns
Open-drain driving (LXS0204) 2 6.4 2 6.1 - - ns
tSKEW Channel-to-Channel Skew Push-pull driving 1 - 1 - 1 - ns
fDATA Maximum Data Rate Push-pull driving 24 - 24 - 24 - Mbps
Open-drain driving 2 - 2 - 2 - Mbps

Test Circuits

The document includes diagrams for various test circuits used to evaluate the performance of the LXS0204/LXS0204L, including rail-to-rail driving and open-drain driving configurations for both Port A and Port B.

Figure 2. Rail-to-Rail Driving A

Figure 3. Rail-to-Rail Driving B

Figure 4. Open-Drain Driving A

Figure 5. Open-Drain Driving B

Figure 6. Test Circuit for Enable/Disable Time Measurement

Figure 7. Timing Definitions for Propagation Delays and Enable/Disable Measurement

Definition of Vx and Vy

Supply Voltage Output
Vcco Vx Vy
0.72V VOL + 0.1V VOH - 0.1V
0.95V VOL + 0.1V VOH - 0.1V
1.2V +/- 0.12V VOL + 0.1V VOH - 0.1V
1.8V +/- 0.15V VOL + 0.15V VOH - 0.15V
2.5V +/- 0.2V VOL + 0.15V VOH - 0.15V
3.3V +/- 0.3V VOL + 0.3V VOH - 0.3V
5V +/- 0.5V VOL + 0.3V VOH - 0.3V

Functional Description

Level Translator Architecture

The LXS0204/LXS0204L is a 4-bit configurable, dual-supply, bi-directional, auto-sensing translator that does not require a directional control pin. The A-port operating voltage range is from 0.72V to 1.98V, and the B-port operating voltage range is from 1.65V to 5.5V.

The translator has integrated a 10kΩ pullup resistor on port A and port B. The integrated pullup resistors are used to pull the I/O lines to either VCCA or VCCB. When OE goes low, the pullup resistors are disabled. There is an nMOS transistor that connects the A port and B port. When either A port or B port is pulled low externally, the nMOS transistor will turn on and pull the other port low. When both A port and B port are not pulled low externally, the pullup resistors will pull both ports to their corresponding VCC. In addition, each output has integrated a one-shot rising-edge detector to turn on the pMOS transistor within a short duration to improve the low-to-high transition.

Figure 8. Architecture

Pullup Resistors

The translator has integrated two pullup resistors at both ports A and B of each channel to maintain the logic-high level at VCCA or VCCB if no external pulldown driver turns on. The pullup resistors are also responsible to pull up the ports initially before the internal one-shot pMOS transistors turn on.

The LXS0204L has an additional feature in which the internal pullup resistors are disabled during a logic-low level on Port A or Port B. This reduces the static power consumption during a logic-low state. The internal pullup resistors are re-enabled during a logic-high level on Port A and or Port B. Please note that using the LXS0204L in open-drain applications requires the use of external pullup resistors to initially pull the ports high. This is because the LXS0204L's internal pullup resistors are disabled during a logic-low state and are not available to pull the ports HIGH themselves. Using the LXS0204L in push-pull applications does not require the use of external pullup resistors.

Input Driver Requirements

The rise (tr) and fall (tr) timing parameters of the open-drain outputs depend on the magnitude of the pullup resistors. In addition, the propagation time (tpD) and maximum data rate depend on the impedance of the device that is connected to the translator. The timing parameters and DC output voltages listed in the data sheet assume that the output impedance of the drivers connected to the translator is less than 500Ω and no external pullup resistors are connected. Drivers with lower output impedance may be needed in order to maintain low VOL if small external pullup resistors are used.

Output Enable (OE)

The LXS0204/LXS0204L has an Output Enable pin (OE) that enables the device by setting HIGH. Driving the Output Enable pin to a low logic level minimizes the power consumption of the device and sets all I/Os in high-impedance OFF state. Normal translation operation occurs when the OE pin is equal to a logic-high signal. The OE pin is referenced to the VCCA supply and can tolerate the VCCB voltage.

Power Supply Guidelines

During normal operation, supply voltage VCCA must be less than or equal to VCCB. The sequencing of the power supplies will not damage the device during the power-up operation. For optimal performance, 0.01μF to 0.1μF decoupling capacitors should be used on the VCCA and VCCB power supply pins. Ceramic capacitors are a good design choice to filter and bypass any noise signals on the voltage lines to the ground plane of the PCB. The noise immunity will be maximized by placing the capacitors as close as possible to the supply and ground pins, along with minimizing the PCB connection traces.

Ordering Information

The ordering part number is determined by the feature and package type. The LXS0204 series offers a choice between standard internal pullup resistors (blank) and a version that disables internal pullup resistors during logic-low (L).

Feature Package Packing
(Blank): Static Internal Rpu CBA12: U-WLB1014-12 (Type JC) 7: Tape & Reel
L: Disable Internal Rpu During Logic-Low CBA12: U-WLB1014-12 (Type JC) 7: Tape & Reel
Orderable Part Number Feature Package Package Code Qty. Carrier
LXS0204CBA12-7 Static Internal Pullup Resistors U-WLB1014-12 (Type JC) CBA12 3,000 Tape & Reel
LXS0204LCBA12-7 Disable Internal Pullup Resistors During Logic-Low U-WLB1014-12 (Type JC) CBA12 3,000 Tape & Reel

Marking Information

The marking information for the U-WLB1014-12 (Type JC) package includes an identification code (XX) for the year and week of manufacture, and an internal code.

Orderable Part Number Package Identification Code
LXS0204CBA12-7 U-WLB1014-12 (Type JC) P2
LXS0204LCBA12-7 U-WLB1014-12 (Type JC) P5

Package Outline Dimensions

Detailed package outline dimensions for the U-WLB1014-12 (Type JC) package are provided in millimeters. A link to the Diodes Incorporated website for the latest version of package outlines is included.

Dim Min Max Typ
A 0.489 0.565 0.527
A1 0.140 0.180 0.160
A2 0.313 0.339 0.326
B 0.035 0.045 0.040
A3 0.191 0.231 0.211
D 1.020 1.050 1.035
E 1.370 1.400 1.385
e1 - - 0.350
e2 - - 0.350
e3 - - 0.700
e4 - - 1.050
z1 - - 0.063
z2 - - 0.063

All Dimensions in mm

Suggested Pad Layout

A suggested pad layout for the U-WLB1014-12 (Type JC) package is provided, with dimensions in millimeters. A link to the Diodes Incorporated website for the latest version of suggested pad layouts is included.

Dimensions Value (in mm)
C 0.350
D 0.211
X 0.700
Y 1.050
Y1 0.175

Mechanical Data

Important Notice

Diodes Incorporated (Diodes) and its subsidiaries make no warranty of any kind, express or implied, with regards to any information contained in this document. Diodes assumes no liability for any application-related information, support, assistance or feedback. Products described herein may be covered by patents and trademarks. Diodes' products are provided subject to Diodes' Standard Terms and Conditions of Sale. Diodes' products and technology may not be used for or incorporated into any products or systems whose manufacture, use or sale is prohibited under any applicable laws and regulations. While efforts have been made to ensure the information contained in this document is accurate, complete and current, it may contain technical inaccuracies, omissions and typographical errors. Diodes does not warrant that information contained in this document is error-free. This notice may be periodically updated with the most recent version available at https://www.diodes.com/about/company/terms-and-conditions/important-notice. The Diodes logo is a registered trademark of Diodes Incorporated. All other trademarks are the property of their respective owners.

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