NJU26901
Digital Audio Delay
Package
General Description
The NJU26901 is a digital audio delay. The NJU26901 provides delay-time
adjustment function and digital audio interface.
NJU26901E2
NJU26901M
FEATURES
• 2-Channel Audio Delay (24 bits data width).
Delay Time 85msec at fs = 48kHz ( 128msec at fs = 32kHz , 43msec at fs = 96kHz)
• 4 delay time modes( ¼, ½, ¾, 1 max. delay ) are selectable without a micro-computer.
• To make long delay time, the NJU26901 can be connected serially.
• Non-audio-signal data can be delayed by the NJU26901.
Hardware Specification
•
•
•
•
•
Digital Audio Interface
Digital Audio Format
Audio Bit Clock (BCK) Frequency
Package
Power Supply
:
:
:
:
:
1 Input port / 1 Output port
I2S 24bit BCK : 64fs, Slave Mode
13MHz Max ( approximate fs=200KHz)
EMP8, DMP8 ( Pb-Free )
2.5V ( +3.3V input tolerant )
Function Block Diagram
NJU26901
BCKI
LRI
SERIAL
LRI
BCKI
SDI
AUDIO
INTERFACE
Delay
RAM
L/R in
SERIAL
AUDIO
INTERFACE
L/R out
SDO
Control
Logic
COUNT[1:0]
Fig. 1 Function Block Diagram
Ver.2007-01-25
-1-
NJU26901
Electric Characteristics
(VDD=2.5V,Ta=25°C)
Table 3 Electric Characteristics
Parameter
Symbol
Operating VDD Voltage
IDD
BCKI:13MHz
SDO:CL=25pF
Min.
Typ.
Max.
Units
2.25
VDD
Operating Current
Test Condition
2.5
2.75
V
-
1.0
-
mA
Operating Temperature
TOPR
-40
25
85
°C
High Level Input Voltage
VIH
2.0
-
3.3
V
Low Level Input Voltage
VIL
VOH
Low Level Output Voltage
VOL
Input Current
IIN
IOH= -2mA
IOH= -100µA
IOL= 2mA
IOL= 100µA
VIN= VSS to 3.6V
-
0.5
0.4
0.1
+15
V
High Level Output Voltage
VDD-0.4
VDD-0.1
-15
µA
Input Current
IIN(PU)
VIN= VSS to 3.6V
-100
-
+15
µA
V
V
Input Capacitance
CIN
-
10
-
pF
Input Rise/Fall transition Time
tr / tf
-
-
100
ns
Equivalent Circuit
VDD
Input
terminal
VDD
Output
terminal
Input
terminal
VSS
Input Pin #1,2,3
VDD
VSS
VSS
Input Pin #5,6
Output Pin #7
Fig. 3 Input Terminal Equivalent Circuit
Ver.2007-01-25
-3-
