PCA9557D

PCA9557 Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Reset and Configuration Registers

Manufacturer

Texas Instruments

Overview

Part: PCA9557 from Texas Instruments

Type: 8-Bit I2C and SMBus Low-Power I/O Expander

Key Specs:

  • Low standby current consumption: 1μA maximum
  • Operating power-supply voltage range: 2.3V to 5.5V
  • I/O ports: 5V Tolerant
  • I2C bus speed: 400kHz Fast I2C bus
  • Latch-up performance: exceeds 100mA per JESD 78, class II
  • ESD protection: 2000V Human-body model (A114-A)
  • ESD protection: 200V Machine model (A115-A)
  • ESD protection: 1000V Charged-device model (C101)

Features:

  • I2C to parallel port expander
  • Three hardware address pins allow for use of up to eight devices on I2C/SMBus
  • Lower-voltage higher-performance migration path for PCA9556
  • Input and output configuration register
  • Polarity inversion register
  • Active-low reset input
  • Internal power-on reset
  • High-impedance open drain on P0
  • Power up with all channels configured as inputs
  • No glitch on power up
  • Noise filter on SCL or SDA inputs
  • Latched outputs with high current drive maximum capability for directly driving LEDs

Applications:

  • Telecom shelters: filter units
  • Servers
  • Routers (telecom switching equipment)
  • Personal computers
  • Personal electronics
  • Industrial automation
  • Products with GPIO-limited

Package:

  • D (SOIC, 16): 9.9mm × 6mm
  • DB (SSOP, 16): 6.2mm × 7.8mm
  • DGV (TVSOP, 16): 3.6mm × 6.4mm
  • PW (TSSOP, 16): 5mm × 6.4mm
  • RGY (VQFN, 16): 4mm × 3.5mm
  • RGV (VQFN, 16): 4mm × 4mm

Features

  • Low standby current consumption of 1μA maximum
  • I 2C to parallel port expander
  • Operating power-supply voltage range of 2.3V to 5.5V
  • 5V Tolerant I/O ports
  • 400kHz Fast I2C bus
  • Three hardware address pins allow for use of up to eight devices on I2C/SMBus
  • Lower-voltage higher-performance migration path for PCA9556
  • Input and output configuration register
  • Polarity inversion register
  • Active-low reset input
  • Internal power-on reset
  • High-impedance open drain on P0
  • Power up with all channels configured as inputs
  • No glitch on power up
  • Noise filter on SCL or SDA inputs
  • Latched outputs with high current drive maximum capability for directly driving LEDs
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22
    • 2000V Human-body model (A114-A)
    • 200V Machine model (A115-A)
    • 1000V Charged-device model (C101)

Applications

Pin Configuration

Figure 4-1. D, DB, DGV, PW Package, 16-Pin SOIC, SSOP, TVSOP, or TSSOP (Top View)

Figure 4-2. RGY or RGV Package, 16-Pin VQFN or VQFN (Top View)

Table 4-1. Pin Functions

PIN
NAMENO.
SCL1
SDA2
A03
A14
A25
P06
P17
GND8
P29
P310
P411
P512
P613
P714
RESET15
VCC16

(1) I = input, O = output, P = power, G = Ground

Figure 4-3. RGV Package, 16-Pin QFN (Top View)

Table 4-2. Pin Functions, RGV

PINTYPE (1)DESCRIPTION
NAMENO.DESCRIPTION
A01IAddress input. Connect directly to V CC or ground.
A12IAddress input. Connect directly to V CC or ground.
A23IAddress input. Connect directly to V CC or ground.
P04I/OP-port input/output. High impedance open-drain design structure. Connect to VCC through a pullup resistor.
P15I/OP-port input/output. Push-pull design structure
GND6GGround
P27I/OP-port input/output. Push-pull design structure
P38I/OP-port input/output. Push-pull design structure
P49I/OP-port input/output. Push-pull design structure
P510I/OP-port input/output. Push-pull design structure
P611I/OP-port input/output. Push-pull design structure
P712I/OP-port input/output. Push-pull design structure
RESET131Active-low reset input. Connect to V CC through a pullup resistor if no active connection is used.
V CC14PSupply voltage
SCL15ıSerial clock bus. Connect to V CC through a pullup resistor.
SDA16I/OSerial data bus. Connect to V CC through a pullup resistor.

(1) I = input, O = output, P = power, G = Ground

Electrical Characteristics

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

PARAMETERTEST CONDITIONSVCCMINTYP (1)MAXUNIT
V IKInput diode clamp voltageI I = -18mA2.3V to 5.5V-1.2V
V PORPower-on reset voltageV I = V CC or GND, I O = 0V POR1.652.1V
2.3V1.8,
3V2.6,
IOH = -8mA4.5V3
. ,Donathish lood outside (3)4.75V4.1.,
V OHP-port high-level output voltage (3)2.3V1.5V
1043V2.5,
I OH = -10mA 4.5V 3 4.75V 4
4.75V4
SDAV OL = 0.4V2.3V to 5.5V3
l OLP port (2)V OL = 0.5V820
V OL = 0.55V2.3V to 5.5V8 20- mA
V OL = 0.7V1024
P port, except for P0 (2)V OH = 2.3V2.3V to 5.5V-4mA
I OHP0 (2)V OH = 4.6V4.6V to 5.5V1
P0 (2)V OH = 3.3V3.3V to 5.5V1μA
SCL, SDAV = V = CND2 2)/4- 5 5)/,±1
l lA2-A0, RESETVI = VCC or GND2.3V to 5.5V±1μΑ
I IHP portV I = V CC2.3V to 5.5V1μA
I ILP portV I = GND2.3V to 5.5V1μA
5.5V1925
VI = VCC or GND, IO = 0 , $I/O = 1$ inputs, fSCL = 400 kHz3.6V1222
On another was die111pato, 150L 400 KH22.7V820
Operating mode5.5V1.55
IccVI = VCC or GND, IO = 0 , $I/O = 1$ inputs, fSCL = 100 kHz3.6V14μΑ
2.7V0.63
5.5V0.251
Standby modeVI = VCC or GND, IO = 0 , $I/O = 1$ inputs, fSCL = 0 kHz3.6V0.250.9
IIIpuis, ISCL – 0 kHz0.20.8

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

PARAMETERTEST CONDITIONSVCCMIN TYP(1)MAXUNIT
Δ1Additional current in standby modeinputs at V CC or GND2.3V to 5.5V0.2mA
ΔI CCAdditional current in standby modeEvery LED I/O at V1 = 4.3 V , fSCL = 0 kHz5.5V0.4ШA
CıSCLV I = V CC or GND2.3V to 5.5 V46pF
CSDAV IO = V CC or GND2.3V to 5.5V5.58pF
C ioP portAIO - ACC OL GIAD2.30 10 5.507.59.5pг
  • (1) All typical values are at nominal supply voltage (2.5, 3.3, or 5V VCC ) and TA = 25°C .
  • (2) Each I/O must be externally limited to a maximum of 25mA, and the P port (P7-P0) must be limited to a maximum current of 200mA.
  • (3) The total current sourced by all I/Os must be limited to 85mA per bit.

Absolute Maximum Ratings

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

MINMAXUNIT
VCCSupply voltage–0.56V
VIInput voltage (2)–0.56V
VOOutput voltage (2)–0.56V
IIKInput clamp currentVI
< 0		–20mA
IOKOutput clamp currentVO < 0–20mA
IIOKInput/output clamp currentVO < 0 or VO > VCC–20μA
IOLContinuous output low currentVO = 0 to VCC50mA
IOHContinuous output high currentVO = 0 to VCC–50mA
Continuous current through GND–250
ICCContinuous current through VCC160mA
TstgStorage temperature–65150°C

(1) Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply functional operation of the device at these or any other conditions beyond those listed under Recommend Operating Conditions. If briefly operating outside the Recommend Operating Conditions but within the Absolute Maximum Ratings, the device may not sustain damage, but it may not be fully functional. Operating the device in this manner may affect device reliability, functionality, performance, and shorten the device lifetime.

(2) The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.

Recommended Operating Conditions

MINMAXUNIT
VCCSupply voltage2.35.5V
VIHSCL, SDA0.7 × VCC5.5
High-level input voltageA2–A0, P7–P0, RESET2.25.5V
SCL, SDA–0.50.3 × VCC
VILLow-level input voltageA2–A0, P7–P0, (RESET VCC > 2.4V)–0.50.8V
RESET VCC ≤ 2.4V–0.50.75
IOHHigh-level output currentP7–P1–10mA
IOLLow-level output currentP7–P025mA
TAOperating free-air temperature–4085°C

5.4 Thermal Information

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

PCA9557
THERMAL METRIC (1)D (SSOP)DB
(SSOP)		DGV
(SSOP)		PW
(SSOP)
16 PINS16 PINS16 PINS16 PINS
Rθ JAJunction-to-ambient thermal resistance77.28212098.0
R 0JC(top)Junction-to-case (top) thermal resistance40.030.7
Rθ JBJunction-to-board thermal resistance39.252.7
ΨЈTJunction-to-top characterization parameter6.51.0
ΨЈBJunction-to-board characterization parameter38.852.1
Rθ JC(bot)Junction-to-case (bottom) thermal resistanceN/AN/A

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

Thermal Information

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

PCA9557
THERMAL METRIC (1)D (SSOP)DB
(SSOP)		DGV
(SSOP)		PW
(SSOP)
16 PINS16 PINS16 PINS16 PINS
Rθ JAJunction-to-ambient thermal resistance77.28212098.0
R 0JC(top)Junction-to-case (top) thermal resistance40.030.7
Rθ JBJunction-to-board thermal resistance39.252.7
ΨЈTJunction-to-top characterization parameter6.51.0
ΨЈBJunction-to-board characterization parameter38.852.1
Rθ JC(bot)Junction-to-case (bottom) thermal resistanceN/AN/A

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

Related Variants

The following components are covered by the same datasheet.

Part NumberManufacturerPackage
PCA9557Texas Instruments—
PCA9557DBTexas Instruments—
PCA9557DB.ATexas Instruments—
PCA9557DBRTexas Instruments—
PCA9557DBR.ATexas Instruments—
PCA9557DGVRTexas Instruments—
PCA9557DGVR.ATexas Instruments—
PCA9557DRTexas Instruments—
PCA9557DR.ATexas Instruments—
PCA9557PWTexas Instruments—
PCA9557PWRTexas Instruments—
PCA9557PWR.ATexas Instruments—
PCA9557PWRG4Texas Instruments—
PCA9557PWRG4.ATexas Instruments—
PCA9557PWTTexas Instruments—
PCA9557RGVRTexas Instruments—
PCA9557RGVR.ATexas Instruments—
PCA9557RGYRTexas Instruments—
PCA9557RGYR.ATexas Instruments—
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