NJW1321 New Japan Radio Co.,Ltd, NJW1321 Datasheet - Page 5

• Manufacturer Part Number: NJW1321
• Description: Njw1321 Wide Band Video Switch With I2c Bus
• Manufacturer: New Japan Radio Co.,Ltd

NOTE). Data hold time : t
providing a hold time of at least 300nsec for the SDA in the master device.
(Vf) as much as possible.
The SDA block in the NJW1321 does not hold data. Add external data-delay-circuit of the SDA terminal, in case of not
The time-consists of the data-delay-circuit of the SDA terminal are as follows.
In addition, Schottky barrier diode (SBD) influences a Low level at the Acknowledge. Therefore choose the low forward voltage
CHARACTERISTICS OF BUS LINES (SDA,SCL) FOR I
Please hold the Data Hold Time (t
(a) Low level
(b) High level
SCL clock frequency
Hold time (repeated) START condition.
Low period of the SCL clock
High period of the SCL clock
Set-up time for a repeated START condition
Data hold time
Data set-up time
Rise time of both SDA and SCL signals
Fall time of both SDA and SCL signals
Set-up time for STOP condition
Bus free time between a STOP and START condition
Capacitive load for each bus line
Noise margin at the Low level
Noise margin at the High level
NOTE)
PARAMETER
High level: T
Low level: T
MASTER
HD:DAT
V
DD
R
LH
HL
P
≈ R
≈ R
HD:DAT
P
D
*C
*C
) to 300ns or more to avoid status of unstable at SCL falling edge.
D
D
R
P
SBD
R
D
SYMBOL
t
t
t
t
t
HD:STA
HD:DAT
SU:DAT
SU:STO
SU:STA
t
t
t
V
f
HIGH
V
LOW
SCL
BUF
C
C
t
t
nH
nL
r
f
b
D
C
2
SCL
SDA
C-BUS DEVICES
b
; total capacitance of one bus line in pF.
MIN.
250
4.0
4.7
4.0
4.7
4.0
4.7
0.5
0
1
-
-
-
-
Standard mode
NJW1321
TYP.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
MAX.
1000
100
300
400
-
-
-
-
-
-
-
-
-
-
UNIT
kHz
pF
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs
V
V
NJW1321
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