MAX16048ACB+ Maxim Integrated Products, MAX16048ACB+ Datasheet - Page 51

• Manufacturer Part Number: MAX16048ACB+
• Description: IC EE-PROG SYS MGR 8CH 64-TQFP
• Manufacturer: Maxim Integrated Products
• Type: System Managerr

Specifications of MAX16048ACB+

• Number Of Voltages Monitored: 8
• Output: Open Drain, Push-Pull
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The acknowledge bit (ACK) is the 9th bit attached to
any 8-bit data word. The receiving device always gen-
erates an ACK. The MAX16046A/MAX16048A generate
an ACK when receiving an address or data by pulling
SDA low during the 9th clock period (Figure 11). When
transmitting data, such as when the master device
reads data back from the MAX16046A/MAX16048A, the
device waits for the master device to generate an ACK.
Monitoring ACK allows for detection of unsuccessful
data transfers. An unsuccessful data transfer occurs if
the receiving device is busy or if a system fault has
occurred. In the event of an unsuccessful data transfer,
the bus master should reattempt communication at a
later time. The MAX16046A/MAX16048A generate a
NACK after the command byte received during a soft-
ware reboot, while writing to the EEPROM, or when
receiving an illegal memory address.
Figure 11. Acknowledge
System Managers with Nonvolatile Fault Registers
TRANSMITTER
RECEIVER
SDA BY
SDA BY
SCL
12-Channel/8-Channel EEPROM-Programmable
S
______________________________________________________________________________________
1
Acknowledge
2
Use the slave address input, A0, to allow multiple identi-
cal devices to share the same serial bus. Connect A0 to
GND, DBP (or an external supply voltage greater than
2V), SCL, or SDA to set the device address on the bus.
See Table 31 for a listing of all possible 7-bit addresses.
Table 31. Setting the I
Address
X = Don’t care, R = Read/write select bit
CLOCK PULSE FOR ACKNOWLEDGE
SDA
SCL
A0
0
1
8
2
SLAVE ADDRESS
C/SMBus Slave
1010 00XR
1010 01XR
1010 10XR
1010 11XR
NACK
ACK
9
Slave Address
51