DS2172
13 of 22
SR: STATUS REGISTER (Address=14 Hex)
(MSB) (LSB)
- RA1 RA0 RLOS BED BCOF BECOF SYNC
SYMBOL POSITION NAME AND DESCRIPTION
-SR.7Not Assigned. Could be any value when read.
RA1 SR.6 Receive All Ones. Set when 32 consecutive 1s are received; allowed to be
cleared when a 0 is received.
RA0 SR.5 Receive All Zeros. Set when 32 consecutive 0s are received; allowed to be
cleared when a 1 is received.
RLOS SR.4 Receive Loss Of Sync. Set when the device is searching for
synchronization. Once sync is achieved, will remain set until read.
BED SR.3 Bit Error Detection. Set when bit errors are detected.
BCOF SR.2 Bit Counter Overflow. Set when the 32-bit BCR overflows.
BECOF SR.1 Bit Error Count Overflow. Set when the 32-bit BECR overflows.
SYNC SR.0 Sync. Real time status of the synchronizer (this bit is not latched). Will be
set when synchronization is declared. Will be cleared when 6 or more bits
out of 64 are received in error (if PCR.2 = 0).
DS2172
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IMR: INTERRUPT MASK REGISTER (Address=15 Hex)
(MSB) (LSB)
- RA1 RA0 RLOS BED BCOF BECOF SYNC
SYMBOL POSITION NAME AND DESCRIPTION
-IMR.7Not Assigned. Should be set to 0 when written to.
RA1 IMR.6
Receive All 1s.
0 = interrupt masked
1 = interrupt enabled
RA0 IMR.5
Receive All 0s.
0 = interrupt masked
1 = interrupt enabled
RLOS IMR.4
Receive Loss Of Sync.
0 = interrupt masked
1 = interrupt enabled
BED IMR.3
Bit Error Detection.
0 = interrupt masked
1 = interrupt enabled
BCOF IMR.2
Bit Counter Overflow.
0 = interrupt masked
1 = interrupt enabled
BECOF IMR.1
Bit Error Count Overflow.
0 = interrupt masked
1 = interrupt enabled
SYNC IMR.0
Sync.
0 = interrupt masked
1 = interrupt enabled
DS2172
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12.0 AC TIMING AND DC OPERATING CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground -1.0V to +7.0V
Operating Temperature for DS2172TN -40°C to +85°C
Storage Temperature -55°C to +125°C
Soldering Temperature See J-STD-020A Specification
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
(0
0
C to 70
0
C for DS2172T)
-40
0
C to +85
0
C for DS2172TN)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Logic 1 V
IH
2.0 V
DD
+0.3 V
Logic 0 V
IL
-0.3 +0.8 V
Supply V
DD
4.50 5.50 V
CAPACITANCE (t
A
=25
0
C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
IN
5pF
Output Capacitance C
OUT
7pF
DC CHARACTERISTICS
(0
0
C to 70
0
C for DS2172T; V
DD
=5V±10%)
-40
0
C to +85
0
C for DS2172TN; V
DD
=5V±10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Supply Current @ 5V I
DD
10 mA 1
Input Leakage I
IL
-1.0 +1.0
µA
2
Output Leakage I
LO
1.0
µA
3
Output Current @ 2.4V I
OH
-1.0 mA
Output Current @ 0.4V I
OL
+4.0 mA
NOTES:
1. TCLK = RCLK = 1.544 MHz; outputs open circuited.
2. 0.0V < V
IN
< V
DD
.
3. Applies to
INT when tri-stated.

DS2172T+

Mfr. #:
Manufacturer:
Description:
Telecom ICs Bit Error Rate Tester (BERT)
Lifecycle:
New from this manufacturer.
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