TCA6507_10 Datasheet, PDF (17/32 Pages) Texas Instruments – LOW-VOLTAGE 7-BIT I2C AND SMBus LED DRIVER WITH INTENSITY CONTROL AND SHUTDOWN

www.ti.com
TCA6507
LOW-VOLTAGE 7-BIT I²C AND SMBus LED DRIVER
WITH INTENSITY CONTROL AND SHUTDOWN
SCPS164B – MAY 2007 – REVISED NOVEMBER 2007
I²C Interface Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 14)
f_scl
t_sch
t_scl
t_sp
t_sds
t_sdh
t_icr
t_icf
t_ocf
t_buf
t_sts
t_sth
t_sps
t_vd(data)
t_vd(ack)
C_b
I²C clock frequency
I²C clock high time
I²C clock low time
I²C spike time
I²C serial-data setup time
I²C serial-data hold time
I²C input rise time
I²C input fall time
I²C output fall time
10-pF to 400-pF bus
I²C bus free time between Stop and Start conditions
I²C Start or repeated Start condition setup
I²C Start or repeated Start condition hold
I²C Stop condition setup
Valid-data time
SCL low to SDA output valid
Valid-data time of ACK condition
I²C bus capacitive load
ACK signal from SCL low to
SDA (out) low
STANDARD MODE
I²C BUS
MIN
MAX
0
100
4
4.7
50
250
0
1000
300
300
4.7
4.7
4
4
1
1
0
400
FAST MODE
I²C BUS
MIN MAX
0
400
0.6
1.3
50
100
0
20 + 0.1C_b(1)
300
20 + 0.1C_b(1)
300
20 + 0.1C_b(1)
250
1.3
0.6
0.6
0.6
1
UNIT
kHz
µs
µs
ns
ns
ns
ns
ns
ns
µs
µs
µs
µs
µs
1 µs
0
400 pF
(1) C_b = total capacitance of one bus line in pF
Oscillator Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted)
t_OSC
Oscillator start-up time from powerdown or shutdown mode to fully on at 32 kHz
STANDARD
MODE
I²C BUS
MIN MAX
5
FAST MODE
I²C BUS
MIN MAX
5
UNIT
ms
Switching Characteristics
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
STANDARD MODE
I²C BUS
MIN
MAX
t_pv
Output data valid
(in general-purpose output mode)
SCL
P port
400
t_ps
Shutdown data valid
t_w
EN pulse duration
EN (low)
P port (high)
60
60
FAST MODE
I²C BUS
MIN
MAX
400
60
60
UNIT
ns
µs
µs
Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): TCA6507
Submit Documentation Feedback
17