MC44BS373CAFCR2 Freescale Semiconductor, MC44BS373CAFCR2 Datasheet - Page 29

• Manufacturer Part Number: MC44BS373CAFCR2
• Description: IC MODULATOR AUD/VID U/V 20-QFN
• Manufacturer: Freescale Semiconductor

Specifications of MC44BS373CAFCR2

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 20-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.3 Level Definitions
SDA/SCL high and low levels are designed to be compatible with 0–5 V and 0–3.3 V SDA/SCL signals.
16.4 High-Speed I
16.5 I
It is possible to select one specific I
controlled by an external pin (CAS) where an external resistor is connected to ground. By changing the
value of this resistor it is possible to change the DC level on the multi-level CAS pin. This DC level is
compared against internal thresholds (1.65, 0.42 and 2.82 V) and, depending on the result, one of the
available addresses is selected according to Table 29.
When chip addresses CC or C8 are selected, the DC level at the CAS pin is set by a ratio of an external
resistor (33 KΩ or 180 KΩ ±10%) and the internal pull-up resistor (85 KΩ typical with a tolerance of 40%
worst case).
SDA
SCL
STA
2
C Write-Mode Format and Bus Receiver
1
Chip Address (0xCA)
The information in this section concerning I
the 20-pin package only. The I
0xCA and cannot be changed.
2
3
Table 29. Chip Address Selected Versus CAS Pin Level
Open
180-KΩ pull-down
33-KΩ pull-down
0 (connected to ground)
4
2
External Resistor on Pin CAS
C-Compatible Bus Format
5
SDA
6
7
2
Figure 12. SDA/SCL Levels
C address from among four available addresses. This selection is
MC44BS373CA Data Sheet
Figure 13. I
8
0 V
Vcc
Vil
Vih
ACK
9 10
First Data Byte (C1 or FM)
2
C address in the 16-pin packages is set at
11 12 13
NOTE
2
C Bus Timing
2
14
C address selection applies to
Dead Band
15
I
2
C address
16 17 18
0xCA
0xCC
0xCE
0xC8
High Speed I2C Compatible Bus
ACK
19
Data
44
ACK
45
Stop