73M1916-IVT/F Maxim Integrated Products, 73M1916-IVT/F Datasheet - Page 61

• Manufacturer Part Number: 73M1916-IVT/F
• Description: Interface - Specialized DAA-FXO VolP SYSTEM LN SIDE
• Manufacturer: Maxim Integrated Products
• Type: MicroDAA with PCM Highwayr

Specifications of 73M1916-IVT/F

• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS_1x66B_001
Upon power up, the following sequence should be used to ensure barrier synchronization:
1. The 73M1906B starts in Barrier Powered Mode and transmits a preamble to aid the PLL locking of
2. When PLL Lock detect is achieved the Line-Side Device transmits status data to the Host-Side
3. When the Line-Side status Data is detected by the Host-Side Device, the barrier is considered to be
4. If the auto-poll mode is enabled, the Device ID is transmitted, which is followed by transmit data.
5. Upon detection of the Device ID, the Line-Side Device considers the barrier to be in synchronization
6. The Line-Side Device starts sending Receive Data.
7. If the Auto-Poll bit is enabled, the Host-Side Device will have polled the Device ID of the Line-Side
9.4
Once the Barrier Interface acquires synchronization, the Barrier Interface state machine automatically
sends a polling command to Line-Side Device requesting it to return its Device ID. This is provided in
REV. Upon power up or loss of barrier synchronization, the contents of REV is cleared. After the
auto-poll sequence, the host should read REV. A non-zero value indicates that synchronization is
established.
The auto-poll mechanism is disabled by resetting the ENAPOL control bit.
9.5
Rev. 1.6
Function
Mnemonic
DISNTR
ENAPOL
ENLPW
ENSYNL
the Line-Side Device.
Device.
in synchronization by the Host-Side Device.
in host-to-line side direction.
Device. If the barrier is synchronized, then Register 1Dh, bits 7-4, will be 1101. If not synchronized,
then 0000.
Auto-Poll
Barrier Control Functions
Register
Location
0x15[6]
0x05[3]
0x02[2]
0x05[1]
Type
WO
W
W
W
Table 37: Barrier Control Functions
Disable No-Transition Timer
If enabled, the No-Transition Timer is a safety feature. If the barrier
fails, i.e. no transition is detected for 400 μs, the Line-Side Device
resets itself and goes on hook to prevent line holding in a failure
condition.
0 = Enables No-Transition Timer of 400 μs. (Default)
1 = Disables No-Transition Timer.
Enable Automatic Polling
0 = Disables automatic polling.
1 = Initiates automatic polling of the 73M1x66B Device ID upon the
establishment of the barrier SYN. (Default)
If SYN is lost, the Device ID will be reset to 0000.
Enable Line Power
0 = Barrier Powered Mode is selected. (Default)
1 = Line Powered Mode is selected.
will not occur.
Enable Synch Loss Detection Interrupt
0 = Disables Synch Loss Detection Interrupt.
1 = Enables Synch Loss Detection Interrupt. (Default) When the
73M1x66B detects a loss of synchronization in Host-Side Barrier
Interface, SYNL 0x03[1] will be set and reset when read.
Bit ENLVD must have the value of 0 before switching from Line
Powered Mode to Barrier Powered Mode. Otherwise level
detection is disabled and the transition to Barrier Powered Mode
Description
73M1866B/73M1966B Data Sheet
61