65 mA 8-bit 2-wire bus output port
PCA9621
65 mA 8-bit 2-wire bus output port
Rev. 1 — 9 March 2011 Product data sheet
1. General description
The PCA9621 ...
Description
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 cap
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ability, 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
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3. Applications
LED and 7-segment displays Simple high-power (500 mA) LED dimming General purpose output Instrumentation indicators
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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
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output output
8 VSS
002aaf379
Fig 1.
Block diagram of PCA9621
PCA9621
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© 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 P
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