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PDF PCA9671 Data sheet ( Hoja de datos )
| Número de pieza | PCA9671 | |
| Descripción | Remote 16-bit I/O expander | |
| Fabricantes | NXP Semiconductors | |
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PCA9671
Remote 16-bit I/O expander for Fm+ I2C-bus with reset
Rev. 01 — 20 December 2006
Product data sheet
1. General description
The PCA9671 provides general purpose remote I/O expansion for most microcontroller
families via the two-line bidirectional bus (I2C-bus) and is a part of the Fast-mode Plus
(Fm+) family.
The PCA9671 is a drop in upgrade for the PCF8575 providing higher I2C-bus speeds
(1 MHz versus 400 kHz) so that the output can support PWM dimming of LEDs, higher
I2C-bus drive (30 mA versus 3 mA) so that many more devices can be on the bus without
the need for bus buffers, higher total package sink capacity (400 mA versus 100 mA) that
supports having all 25 mA LEDs on at the same time and more device addresses (64
versus 8) to allow many more devices on the bus without address conflicts.
The difference between the PCA9671 and the PCF8575 is that the interrupt output on the
PCF8575 is replaced by a RESET input on the PCA9671.
The device consists of a 16-bit quasi-bidirectional port and an I2C-bus interface. The
PCA9671 has a low current consumption and includes latched outputs with 25 mA high
current drive capability for directly driving LEDs. The internal Power-On Reset (POR),
hardware reset pin (RESET) or software reset sequence initializes the I/Os as inputs.
2. Features
I 1 MHz I2C-bus interface
I Compliant with the I2C-bus Fast-mode and Standard-mode
I SDA with 30 mA sink capability for 4000 pF buses
I 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os
I 16-bit remote I/O pins that default to inputs at power-up
I Latched outputs with 25 mA sink capability for directly driving LEDs
I Total package sink capability of 400 mA
I Active LOW reset input
I 64 programmable slave addresses using 3 address pins
I Readable device ID (manufacturer, device type, and revision)
I Low standby current
I −40 °C to +85 °C operation
I ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115, and 1000 V CDM per JESD22-C101
I Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA
I Packages offered: SO24, SSOP24, QSOP24, TSSOP24, HVQFN24, DHVQFN24
1 page  
NXP Semiconductors
PCA9671
Remote 16-bit I/O expander for Fm+ I2C-bus with reset
terminal 1
index area
P00 1
P01 2
P02 3
P03 4
P04 5
P05 6
PCA9671BS
18 AD0
17 P17
16 P16
15 P15
14 P14
13 P13
terminal 1
index area
AD1 2
AD2 3
P00 4
P01 5
P02 6
P03 7
P04 8
P05 9
P06 10
P07 11
PCA9671BQ
23 SDA
22 SCL
21 AD0
20 P17
19 P16
18 P15
17 P14
16 P13
15 P12
14 P11
Transparent top view
002aac248
Fig 7. Pin configuration for HVQFN24
002aac271
Transparent top view
Fig 8. Pin configuration for DHVQFN24
6.2 Pin description
Table 2.
Symbol
RESET
AD1
AD2
P00
P01
P02
P03
P04
P05
P06
P07
VSS
P10
P11
P12
P13
P14
P15
P16
P17
Pin description
Pin
SO24, SSOP24, QSOP24, HVQFN24
TSSOP24, DHVQFN24
1 22
2 23
3 24
41
52
63
74
85
96
10 7
11 8
12[1]
9[1]
13 10
14 11
15 12
16 13
17 14
18 15
19 16
20 17
Description
reset input (active LOW)
address input 1
address input 2
quasi-bidirectional I/O 00
quasi-bidirectional I/O 01
quasi-bidirectional I/O 02
quasi-bidirectional I/O 03
quasi-bidirectional I/O 04
quasi-bidirectional I/O 05
quasi-bidirectional I/O 06
quasi-bidirectional I/O 07
supply ground
quasi-bidirectional I/O 10
quasi-bidirectional I/O 11
quasi-bidirectional I/O 12
quasi-bidirectional I/O 13
quasi-bidirectional I/O 14
quasi-bidirectional I/O 15
quasi-bidirectional I/O 16
quasi-bidirectional I/O 17
PCA9671_1
Product data sheet
Rev. 01 — 20 December 2006
© NXP B.V. 2006. All rights reserved.
5 of 34
5 Page 
NXP Semiconductors
PCA9671
Remote 16-bit I/O expander for Fm+ I2C-bus with reset
Remark: The reading of the Device ID can be stopped anytime by sending a NACK
command.
Remark: If the master continues to ACK the bytes after the third byte, the PCA9671
rolls back to the first byte and keeps sending the Device ID sequence until a NACK
has been detected.
For the PCA9671, the Device ID is as shown in Figure 13.
manufacturer 0 0 0 0 0 0 0 0
part identification 0 0 0 0 0 0 1 0 1 0 1 0 0
category identification
feature identification
revision 0 0 0
002aac249
Fig 13. PCA9671 ID
device ID address
acknowledge from one
or several slave(s)
don't care
acknowledge from
slave to be identified
acknowledge from
slave to be identified
S 1 1 1 1 1 0 0 0 A A6 A5 A4 A3 A2 A1 A0 X A 1 1 1 1 1 0 0 1 A
START condition
I2C-bus slave address of
R/W
the device to be identified
acknowledge
from master
device ID address
R/W
acknowledge
from master
no acknowledge
from master
M7 M6 M5 M4 M3 M2 M1 M0 A C6 C5 C4 C3 C2 C1 C0 F5 A F4 P3 P2 P1 P0 R2 R1 R0 A P
manufacturer name
= 00000000
category identification
= 0000001
feature identification
= 010100
revision = 000
STOP
condition
002aac335
If more than 2 bytes are read, the slave device loops back to the first byte (manufacturer byte)
and keeps sending data until the master generates a ‘no acknowledge’.
Fig 14. Device ID field reading
PCA9671_1
Product data sheet
Rev. 01 — 20 December 2006
© NXP B.V. 2006. All rights reserved.
11 of 34
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet PCA9671.PDF ] | |
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