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PCA9621 Dataheets PDF



Part Number PCA9621
Manufacturers NXP Semiconductors
Logo NXP Semiconductors
Description 65 mA 8-bit 2-wire bus output port
Datasheet PCA9621 DatasheetPCA9621 Datasheet (PDF)

PCA9621 65 mA 8-bit 2-wire bus output port Rev. 1 — 9 March 2011 Product data sheet 1. General description The PCA9621 is a monolithic CMOS integrated circuit for general purpose output drive configurable from a 2-wire bus interface (including I2C-bus, SMBus, PMBus, and other systems based on similar principles). Output ports have a 65 mA sink capability, making them ideal for driving LEDs. The state of the outputs is determined by a programmable 8-bit register which can be read and written via.

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PCA9621 65 mA 8-bit 2-wire bus output port Rev. 1 — 9 March 2011 Product data sheet 1. General description The PCA9621 is a monolithic CMOS integrated circuit for general purpose output drive configurable from a 2-wire bus interface (including I2C-bus, SMBus, PMBus, and other systems based on similar principles). Output ports have a 65 mA sink capability, making them ideal for driving LEDs. The state of the outputs is determined by a programmable 8-bit register which can be read and written via signals from the 2-wire bus (e.g., I2C-bus or similar). The 2-wire bus interface also has 30 mA Fast-mode Plus (Fm+) capability, and consequently can be run in excess of 1 MHz or up to 4000 pF capacitance. As such, the PCA9621 can be connected to other 2-wire devices across long cable connections. It can be mixed with other Fast-mode Plus slaves in systems driven by Fm+ buffers or by the PCA9646 (fully buffered 4-channel bus switch) to build large scale systems with high-speed or high-capacitance drive capability, for example large scale LED displays or controlled lighting. 2. Features and benefits „ „ „ „ „ „ 8 individually selectable open-drain output ports 65 mA static sink capability on all output ports Ports may be paralleled for up to 500 mA drive Ideal for simple LED or general purpose output drive Fast-mode Plus (30 mA, 4000 pF) 2-wire bus capability Works with I2C-bus (Standard-mode, Fast-mode, and Fast-mode Plus), SMBus (standard and high power mode), and PMBus „ Fast switching times allow operation in excess of 1 MHz „ Operating voltages from 2.7 V to 5.5 V www.DataSheet.net/ 3. Applications „ „ „ „ LED and 7-segment displays Simple high-power (500 mA) LED dimming General purpose output Instrumentation indicators Datasheet pdf - http://www.DataSheet4U.co.kr/ NXP Semiconductors PCA9621 65 mA 8-bit 2-wire bus output port 4. Ordering information Table 1. Ordering information Tamb = −40 to +85 °C. Type number PCA9621D PCA9621PW Topside mark PCA9621 PCA9621 Package Name SO16 TSSOP16 Description plastic small outline package; 16 leads; body width 3.9 mm plastic thin shrink small outline package; 16 leads; body width 4.4 mm Version SOT109-1 SOT403-1 5. Block diagram 2.7 V to 5.5 V R1 R2 VDD R3 R4 R5 R6 PCA9621 SCL 14 SDA 15 FILTER 16 4 5 6 P0 P1 P2 P3 P4 P5 P6 P7 R7 R8 R9 R10 LED LED high current LED RESET A0 A1 A2 3 1 2 13 I2C-BUS SLAVE TRANSCEIVER 7 9 10 11 12 www.DataSheet.net/ output output 8 VSS 002aaf379 Fig 1. Block diagram of PCA9621 PCA9621 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 1 — 9 March 2011 2 of 18 Datasheet pdf - http://www.DataSheet4U.co.kr/ NXP Semiconductors PCA9621 65 mA 8-bit 2-wire bus output port 6. Pinning information 6.1 Pinning A0 A1 RESET P0 P1 P2 P3 VSS 1 2 3 4 16 VDD 15 SDA 14 SCL 13 A2 A0 A1 RESET P0 P1 P2 P3 VSS 1 2 3 4 5 6 7 8 002aaf382 16 VDD 15 SDA 14 SCL 13 A2 12 P7 11 P6 10 P5 9 P4 PCA9621D 5 6 7 8 002aaf381 12 P7 11 P6 10 P5 9 P4 PCA9621PW Fig 2. Pin configuration for SO16 Fig 3. Pin configuration for TSSOP16 6.2 Pin description Table 2. Symbol A0 A1 RESET P0 P1 P2 P3 VSS P4 P5 P6 P7 A2 SCL SDA VDD Pin description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description www.DataSheet.net/ address input 0 address input 1 active LOW reset input output port 0 output port 1 output port 2 output port 3 negative supply (ground) output port 4 output port 5 output port 6 output port 7 address input 2 serial clock line serial data line positive supply PCA9621 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 1 — 9 March 2011 3 of 18 Datasheet pdf - http://www.DataSheet4U.co.kr/ NXP Semiconductors PCA9621 65 mA 8-bit 2-wire bus output port 7. Functional description Refer to Figure 1 “Block diagram of PCA9621”. 7.1 VDD, VSS — DC supply pins The power supply voltage for the PCA9621 may be any voltage in the range 2.7 V to 5.5 V. All other I/Os are clamped to VDD and VSS through ESD protection diodes. 7.2 SCL, SDA — 2-wire bus interface The state of the output ports is determined by the Control register, which is set and read via a 2-wire bus interface using I2C-bus style signalling. The interface is Fast-mode Plus (Fm+) I2C-bus compatible, though the ports contain ESD protection diodes to the positive and negative supplies. Consequently, VI2C-bus (voltage at SCL and SDA) must remain within the VDD and VSS supply levels. 7.3 P0 to P7 — output ports There are eight open-drain output ports whose state is determined by the Control register. Programming a ‘1’ or HIGH to the relevant register bit will turn on the corresponding port, resulting at a LOW or ‘0’ at the port. In the case of LED driving, this would result in the LED turning ON. Programming a ‘0’ or LOW in the register turns off the open-drain port, placing it in a high-impedance mode. www.DataShe.


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