PCA9554; PCA9554A: 8-bit I²C-bus and SMBus I/O port with interrupt
The PCA9554 and PCA9554A are 16-pin CMOS devices that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I²C-bus/SMBus applications and were developed to enhance the NXP Semiconductors family of I²C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, and so on.
The PCA9554/PCA9554A consist of an 8-bit Configuration register (Input or Output selection); 8-bit Input Port register, 8-bit Output Port register and an 8-bit Polarity Inversion register (active HIGH or active LOW operation). The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input Port or Output Port register. The polarity of the read register can be inverted with the Polarity Inversion register. All registers can be read by the system master. Although pin-to-pin and I²C-bus address compatible with the PCF8574 series, software changes are required due to the enhancements and are discussed in Application Note AN469.
The PCA9554/PCA9554A open-drain interrupt output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed. The power-on reset sets the registers to their default values and initializes the device state machine.
Three hardware pins (A0, A1, A2) vary the fixed I²C-bus address and allow up to eight devices to share the same I²C-bus/SMBus. The PCA9554A is identical to the PCA9554 except that the fixed I²C-bus address is different allowing up to sixteen of these devices (eight of each) on the same I²C-bus/SMBus.
PCA9554_PCA9554A: Product Block Diagram
Outline 3d SOT338-1
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| 8-bit I2C-bus and SMBus I/O port with interrupt (REV 9.0) PDF (585.0 kB) PCA9554_9554A | 19 Mar 2013 |
Application Notes (7)
| Name/Description | Modified Date |
|---|---|
| PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus (REV 1.0) PDF (90.0 kB) AN256 | 23 Mar 2009 |
| Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441 | 20 Jun 2007 |
| I2C/SMBus general purpose I/O expanders (REV 2.0) PDF (294.0 kB) AN469 | 20 Jan 2005 |
| PCA9564 - I2C-bus controller (REV 1.0) PDF (352.0 kB) AN10148 | 22 Nov 2004 |
| PCA9564 Evaluation Board (REV 1.0) PDF (2.0 MB) AN10149 | 19 Aug 2004 |
| I2C manual (REV 1.0) PDF (4.2 MB) AN10216 | 27 Mar 2003 |
| I2C 2002-1A Evaluation Board (REV 2.0) PDF (2.2 MB) AN10146 | 26 Feb 2003 |
Users Guides (4)
| Name/Description | Modified Date |
|---|---|
| I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204 | 28 Apr 2014 |
| I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA | 03 Apr 2013 |
| PCA9698 demonstration board OM6281 (REV 1.0) PDF (558.0 kB) UM10267 | 26 Sep 2008 |
| I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206 | 13 Jun 2006 |
Brochures (6)
| Name/Description | Modified Date |
|---|---|
| NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540 | 01 Aug 2014 |
| Development Tools for ARM-based microcontrollers (REV 2.1) PDF (374.0 kB) 75017388 | 18 Apr 2014 |
| Versatile, easy-to-use GPIO expanders; NXP® 4/8/16-bit I2C/SMBus GPIO expanders PCA9536/54/54A/55 (REV 1.0) PDF (319.0 kB) 75016535 | 01 Aug 2008 |
| Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 (REV 1.0) PDF (1.8 MB) 75016531 | 01 Jul 2008 |
| Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... (REV 1.0) PDF (1.1 MB) 75016543 | 01 Jun 2008 |
| Low-power GPIO expanders for portable applications; NXP® 8/16-bit I2C/SMBus GPIO expanders... (REV 1.0) PDF (239.0 kB) 75016020 | 01 Jun 2007 |
Package Information (6)
| Name/Description | Modified Date |
|---|---|
| plastic small outline package; 16 leads; body width 7.5 mm (REV 1.0) PDF (317.0 kB) SOT162-1 | 08 Feb 2016 |
| plastic shrink small outline package; 20 leads; body width 4.4 mm (REV 1.0) PDF (329.0 kB) SOT266-1 | 08 Feb 2016 |
| plastic shrink small outline package; 16 leads; body width 5.3 mm (REV 1.0) PDF (306.0 kB) SOT338-1 | 08 Feb 2016 |
| plastic thin shrink small outline package; 16 leads; body width 4.4 mm (REV 1.0) PDF (300.0 kB) SOT403-1 | 08 Feb 2016 |
| plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 4 x 4 x 0.85 mm (REV 1.0) PDF (200.0 kB) SOT629-1 | 08 Feb 2016 |
| plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 3 x 3 x 0.85 mm (REV 1.0) PDF (201.0 kB) SOT758-1 | 08 Feb 2016 |
Packing (6)
| Name/Description | Modified Date |
|---|---|
| SO16; Reel dry pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,518 or... (REV 1.0) PDF (271.0 kB) SOT162-1_518 | 25 Nov 2014 |
| HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 2.0) PDF (262.0 kB) SOT758-1_118 | 18 Apr 2013 |
| HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (259.0 kB) SOT629-1_118 | 17 Apr 2013 |
| SSOP20; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (222.0 kB) SOT266-1_118 | 15 Apr 2013 |
| SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 1.0) PDF (229.0 kB) SOT162-1_118 | 12 Apr 2013 |
| TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (218.0 kB) SOT403-1_118 | 08 Apr 2013 |
Reports or Presentations (1)
| Name/Description | Modified Date |
|---|---|
| design_con_2003_tecforum_i2c_b_1 (REV 0.1) PDF (4.2 MB) DESIGN_CON_2003_TECFORUM_I2C_B_1 | 27 Jan 2003 |
Supporting Information (4)
| Name/Description | Modified Date |
|---|---|
| Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW | 08 Oct 2009 |
| Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE | 08 Oct 2009 |
| Footprint for reflow soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-REFLOW | 08 Oct 2009 |
| Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE | 08 Oct 2009 |
Design Support
- Expert mode sample code for 8-bit Totem Pole (REV 1.0) TXT 8-BIT-TOTEM-POLE-READ-WRITE 12/10/2014
- Expert mode sample code for PCA9554A and PCA9554C (REV 1.0) TXT 8-BIT-PCA9554A-C-TOTEM-POLE-RE 12/10/2014
IBIS Model
- PCA9554 IBIS model (REV 1.0) ibs PCA9554 8/13/2014
- PCA9554BS IBIS model (REV 1.0) ibs PCA9554BS 9/20/2012
- PCA9554BS3 IBIS model (REV 1.0) ibs PCA9554BS3 9/20/2012
Ordering Information
| Product | Status |
|---|---|
| PCA9554ATS | Active |
| PCA9554ABS | Active |
| PCA9554BS | Active |
| PCA9554ADB | Active |
| PCA9554TS | Active |
| PCA9554D | Active |
| PCA9554ABS3 | Active |
| PCA9554AD | Active |
| PCA9554PW | Active |
| PCA9554BS3 | Active |
| PCA9554APW | Active |
| PCA9554DB | Active |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | EFR | IFR(FIT) | MTBF(hour) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA9554APW |  | SOT403-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9554APW,118 (9352 692 02118) | 9554ADH | PCA9554APW |    | week 48, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9554APW,112 (9352 692 02112) | 9554ADH | PCA9554APW | | week 48, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9554D |  | SOT162-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE | Reel 13" Q1/T1 | Active | PCA9554D,118 (9352 691 92118) | PCA9554D | PCA9554D |  | week 45, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9554D,112 (9352 691 92112) | PCA9554D | PCA9554D | | week 45, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9554AD | | SOT162-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE | Reel 13" Q1/T1 | Active | PCA9554AD,118 (9352 691 95118) | PCA9554AD | PCA9554AD | | week 45, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9554AD,112 (9352 691 95112) | PCA9554AD | PCA9554AD | | week 45, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9554ABS3 |  | SOT758-1 | Reel 13" Q1/T1 | Active | PCA9554ABS3,118 (9352 830 49118) | 54A | PCA9554ABS3 | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | |
| PCA9554PW | | SOT403-1 | SSOP-TSSOP-VSO-WAVE | Bulk Pack | Active | PCA9554PW,112 (9352 691 94112) | 9554DH | PCA9554PW | | week 48, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Reel 13" Q1/T1 | Active | PCA9554PW,118 (9352 691 94118) | 9554DH | PCA9554PW | | week 48, 2004 | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9554PW/DG | | SOT403-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Discontinued | PCA9554PW/DG,118 (9352 858 96118) | 9554DH | PCA9554PW/DG | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| PCA9554PW/Q900 | | SOT403-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9554PW/Q900,118 (9352 946 94118) | 9554DH | PCA9554PW/Q900 | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| PCA9554BS |  | SOT629-1 | Reel 13" Q1/T1 | Active | PCA9554BS,118 (9352 719 79118) | 9554 | PCA9554BS | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | |
| PCA9554BS3 | | SOT758-1 | Reel 13" Q1/T1 | Active | PCA9554BS3,118 (9352 830 51118) | P54 | PCA9554BS3 | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | |
| PCA9554ADB | | SOT338-1 | SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9554ADB,118 (9352 692 01118) | 9554A | PCA9554ADB | | week 12, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9554ADB,112 (9352 692 01112) | 9554A | PCA9554ADB | | week 12, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9554DB | | SOT338-1 | SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE SSOP-TSSOP-VSO-REFLOW SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9554DB,118 (9352 691 93118) | 9554DB | PCA9554DB | | week 12, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9554DB,112 (9352 691 93112) | 9554DB | PCA9554DB | | week 12, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9554TS |  | SOT266-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9554TS,118 (9352 767 71118) | PCA9554 | PCA9554TS | | week 13, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9554TS,112 (9352 767 71112) | PCA9554 | PCA9554TS | | week 13, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 | ||||
| PCA9554ABS | | SOT629-1 | Reel 13" Q1/T1 | Active | PCA9554ABS,118 (9352 720 03118) | 554A | PCA9554ABS | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 | |
| PCA9554ATS | | SOT266-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9554ATS,118 (9352 767 72118) | PA9554A | PCA9554ATS | | week 13, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9554ATS,112 (9352 767 72112) | PA9554A | PCA9554ATS | | week 13, 2005 | 0.0 | 2.0 | 5E8 | 1 | 1 |
- 8-bit I2C-bus and SMBus I/O port with interrupt pca9554_pca9554a
- PCA9500/PCA9501 provides simple card maintenance and control using I²C-bus PCA9553
- Level shifting techniques in I2C-bus design pca9685pw
- I2C/SMBus general purpose I/O expanders pcf8575ts
- PCA9564 - I2C-bus controller PCA9531
- PCA9564 Evaluation Board PMBTA92
- I2C manual se98apw
- I2C 2002-1A Evaluation Board lm75a
- I2C-bus specification and user manual pca9685pw
- I2C-bus specification and user manual pca9685pw
- PCA9698 demonstration board OM6281 PCA9553
- I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
- NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
- Development Tools for ARM-based microcontrollers PCA9531
- Versatile, easy-to-use GPIO expanders; NXP® 4/8/16-bit I2C/SMBus GPIO expanders PCA9536/54/54A/55 pcf8570p
- Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 lm75a
- Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... PMEG6010CE_AUTOMOTIVE
- Low-power GPIO expanders for portable applications; NXP® 8/16-bit I2C/SMBus GPIO expanders... pcf8570p
- SO16; Reel dry pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,518 or... TJF1052IT
- design_con_2003_tecforum_i2c_b_1 lm75a
- Expert mode sample code for 8-bit Totem Pole PCAL9554BPW
- Expert mode sample code for PCA9554A and PCA9554C PCA9554CPW
- PCA9554 IBIS model PCA9554PW
- PCA9554BS IBIS model PCA9554BS
- PCA9554BS3 IBIS model PCA9554BS3
- plastic small outline package; 16 leads; body width 7.5 mm TJF1052IT
- Footprint for reflow soldering NPIC6C596A_Q100
- Footprint for wave soldering NPIC6C596A_Q100
- SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... TJA1052IT
- SOT403-1 LPC812M101JDH16
- Reel 13" Q1/T1 LPC812M101JDH16
- plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 3 x 3 x 0.85 mm PCF2123
- HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... PCF2123
- plastic shrink small outline package; 16 leads; body width 5.3 mm 74HC_T_595_Q100
- Footprint for reflow soldering 74HC_T_595_Q100
- plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 4 x 4 x 0.85 mm PCA9633
- HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... PCA9633
- plastic shrink small outline package; 20 leads; body width 4.4 mm SA636
- SSOP-TSSOP-VSO-WAVE LPC1114FDH28
- SSOP20; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... SA636
- PCA9554_PCA9554A
- TJF1052IT
- PCA9633
- PCF7900VHN
- HEF4094B
- PCA9633
- SA636
