pca9600 NXP Semiconductors, pca9600 Datasheet - Page 5

• Manufacturer Part Number: pca9600
• Description: Dual Bidirectional Bus Buffer
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 4.
PCA9600_2
Product data sheet
Detail
Supply voltage (V
Maximum operating bus voltage
(independent of V
Typical operating supply current:
Typical LOW-level input voltage on I
(SX/SY side):
LOW-level output voltage on I
(SX/SY side; 3 mA sink):
Temperature coefficient of V
Logic voltage levels on SX/SY bus
(independent of V
Typical propagation delays:
Tx/Rx switching specifications (I
compliant):
Rx logic levels with tighter control than
I
Maximum bus speed:
ESD rating HBM per JESD22-A114:
Package:
2
C-bus limit of 30 % to 70 %:
PCA9600 versus P82B96
CC
CC
CC
) range:
):
):
When the device driving the PCA9600 is an I
is an improvement on the P82B96 as shown in
however, and if the device driving the bus buffer is not I
to use the micro already in the system and bit-bang using two GPIO pins) then here are
some considerations that would point to using the P82B96 instead:
•
•
•
IL
When the pull-up must be the weakest one possible. The spec is 200 A for P82B96,
but it typically works even below that. And if designing for a temperature range 40 C
up to +60 C, then the driver when sinking 200 A only needs to drive a guaranteed
low of 0.55 V. For the PCA9600, over that same temperature range and when sinking
1.3 mA (at 40 C), the device driving the bus buffer must provide the required low of
0.425 V.
When the lower operating temperature range is restricted (say 0 C). The P82B96
larger Sx voltage levels then make a better typical match with the driver, even when
the supply is as low as 3.3 V.
For an I
low that is below 0.83 V. P82B96 guarantees that with a 200 A pull-up.
When the operating temperature range is restricted at both limits. An I
typical output is well below 0.4 V and the P82B96 typically requires 0.6 V input even
at +60 C, so there is a reasonable margin. The PCA9600 requires a typical input low
of 0.5 V so its typical margin is smaller. At 0 C the driver requires a typical input low
of 1.16 V and P82B96 provides 0.75 V, so again the typical margin is already quite big
and even though PCA9600 is better, providing 0.7 V, that difference is not big.
2
/ V
C-bus
2
OL
C-bus
:
2
C-bus
2
C-bus compliant driver on 3.3 V the P82B96 is required to guarantee a bus
PCA9600
2.5 V to 15 V
15 V
5 mA
0.5 V over 40 C to +85 C
0.74 V (max.) over 40 C to +85 C
0 mV/ C
compatible with I
buses using TTL levels (SMBus, etc.)
< 100 ns
yes, all classes including 1 MHz Fm+ yes, all classes including Fm+
yes, 40 % to 55 % (48 % nominal)
> 1 MHz
> 4500 V
SO8, TSSOP8 (MSOP8)
Rev. 02 — 13 August 2008
2
C-bus and similar
2
C-bus compatible device, then the PCA9600
Table
4. There will always be exceptions
2
P82B96
2 V to 15 V
15 V
1 mA
0.65 V at 25 C
0.88 V (typ.) at 25 C
compatible with I
buses using TTL levels (SMBus, etc.)
< 200 ns
yes, 42 % to 58 % (50 % nominal)
> 400 kHz
> 3500 V
DIP8, SO8, TSSOP8 (MSOP8)
C-bus compatible (e.g., you need
2 mV/ C
Dual bidirectional bus buffer
PCA9600
2
C-bus and similar
© NXP B.V. 2008. All rights reserved.
2
C driver's
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