TCA6416A

Part: TCA6416A (TCA6416ARTWR, WQFN-24 package) — Texas Instruments

Type: 16-Bit I²C/SMBus I/O Expander with Voltage Translation

Description: 16-bit I²C/SMBus GPIO expander with 1.65–5.5 V supply on both the I²C side (VCCI) and the P-port side (VCCP), bidirectional level translation, 400 kHz Fast-mode I²C, interrupt output, reset input and 3 μA standby current.

Operating Conditions:

• Supply voltage: VCCI and VCCP 1.65–5.5 V (−40 °C ≤ TA ≤ 85 °C); 1.65–3.6 V for 85 °C < TA ≤ 125 °C
• Operating temperature: −40 to 85 °C for 3.6 V < VCC ≤ 5.5 V; −40 to 125 °C for 1.65 V ≤ VCC ≤ 3.6 V
• I²C clock: 100 kHz (Standard-mode) and 400 kHz (Fast-mode)
• P-port IOL (recommended): 25 mA at TJ ≤ 65 °C, 18 mA at TJ ≤ 85 °C, 9 mA at TJ ≤ 105 °C; IOH 10 mA

Absolute Maximum Ratings:

• Max supply voltage: 6.5 V (VCCI, VCCP)
• Input and output voltage: −0.5 to 6.5 V
• Continuous output low current: 50 mA (P port), 25 mA (SDA, INT)
• Continuous output high current: 50 mA (P port)
• Continuous current: 200 mA through GND, 160 mA through VCCP, 10 mA through VCCI
• Max junction temperature: 130 °C (VCC ≤ 3.6 V); 90 °C (3.6 V < VCC ≤ 5.5 V)
• Storage temperature: −65 to 150 °C
• ESD: HBM ±2000 V, CDM ±1000 V

Key Specs:

• Supply range: 1.65–5.5 V on VCCI and VCCP, independent rails for level translation
• Standby current: 3 μA (feature list)
• Input high threshold: 0.7 × VCC; input low threshold: 0.3 × VCC
• I/O ports are 5 V tolerant (VIH max 5.5 V on P-ports, ADDR and RESET)
• I²C speed: up to 400 kHz
• I/O count: 16 push-pull P-port pins, which power up as inputs
• Address: ADDR pin allows two devices on one bus

Features:

• I²C to parallel port expander with voltage translation
• 5 V tolerant I/O ports
• Active-low reset input
• Open-drain active-low interrupt output
• Input/output configuration register and polarity inversion register
• Internal power-on reset; all channels configured as inputs at power-up
• No glitch on power-up
• Noise filter on SCL and SDA inputs
• Latched outputs with high-current drive capability for directly driving LEDs
• Latch-up performance exceeds 100 mA per JESD 78, class II

Applications:

• Servers
• Routers (telecom switching equipment)
• Personal computers
• Personal electronics (for example, gaming consoles)
• Industrial automation
• Products with GPIO-limited processors

Package:

• WQFN (RTW), 24 pins, 4.00 mm × 4.00 mm
• TSSOP (PW), 24 pins, 7.80 mm × 4.40 mm
• Microstar BGA Junior (ZQS), 24 balls, 3.00 mm × 3.00 mm

• I 2 C to parallel port expander
• Operating power-supply voltage range of 1.65 V to 5.5 V
• Allows bidirectional voltage-level translation and GPIO expansion between 1.8-V, 2.5-V, 3.3-V, and 5-V I 2 C Bus and P-ports
• Low standby current consumption of 3 μA
• 5-V Tolerant I/O ports
• 400-kHz Fast I 2 C bus
• Hardware address pin allows two TCA6416A devices on the same I 2 C/SMBus bus
• Active-low reset input ( RESET)
• Open-drain active-low interrupt output ( INT)
• Input/output configuration register
• Polarity inversion register
• Internal power-on reset
• Power-up with all channels configured as inputs
• No glitch on power up
• Noise filter on SCL and SDA inputs
• Latched outputs with high-current drive maximum capability for directly driving LEDs
• Latch-up performance exceeds 100 mA Per JESD 78, class II
• ESD Protection exceeds JESD 22
• -2000-V Human-body model (A114-A)
• -200-V Machine model (A115-A)
• -1000-V Charged-device model (C101)

• Servers
• Routers (telecom switching equipment)
• Personal computers
• Personal electronics (for example, gaming consoles)
• Industrial automation
• Products with GPIO-limited processors

Not to scale Not to scale

Figure 5-1. PW package, 24-Pin TSSOP (Top View)

Figure 5-2. RTW Package, 24-Pin WQFN (Top View)

Figure 5-3. ZQS Package 24-Pin Microstar BGA TM Junior (Top View)

Table 5-1. Pin Functions

Table 5-1. Pin Functions

over recommended operating free-air temperature range, VCCI = 1.65 V to 5.5 V (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

Applications of the TCA6416A will have this device connected as a target to an I2C controller (processor), and the I2C bus may contain any number of other target devices. The TCA6416A will be in a remote location from the controller, placed close to the GPIOs to which the controller needs to monitor or control.

A typical application of the TCA6416A will operate with a lower voltage on the controller side (VCCI), and a higher voltage on the P-port side (VCCP). The P-ports can be configured as outputs connected to inputs of devices such as enable, reset, power select, the gate of a switch, and LEDs. The P-ports can also be configured as inputs to receive data from interrupts, alarms, status outputs, or push buttons.

• (1) For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic