Datasheet

www.ti.com
Timing Requirements
Reset Delay (R
DELAY
)
TPL9202
8-CHANNEL RELAY DRIVER
WITH INTEGRATED 5-V LDO AND BROWN-OUT DETECTION
SLIS124D – JUNE 2006 – REVISED FEBRUARY 2008
T
A
= – 40 ° C to 125 ° C, V
IN
= 7 V to 18 V (unless otherwise noted)
MIN TYP MAX UNIT
f
SPI
SPI frequency 4 MHz
T1 Delay time, NCS falling edge to SCLK rising edge 10 ns
T2 Delay time, NCS falling edge to SCLK falling edge 80 ns
T3 Pulse duration, SCLK high 60 ns
T4 Pulse duration, SCLK low 60 ns
T5 Delay time, last SCLK falling edge to NCS rising edge 80 ns
T6 Setup time, MOSI valid before SCLK edge 10 ns
T7 Hold time, MOSI valid after SCLK edge 10 ns
T8 Time between two words for transmitting 170 ns
The R
DELAY
output provides a constant current source to charge an external capacitor to approximately 6.5 V.
The external capacitor is selected to provide a delay time, based on the current equation for a capacitor,
I = C( Δ v/ Δ t) and a 28- µ A typical output current.
Therefore, the user should select a 47-nF capacitor to provide a 6-ms delay at 3.55 V.
I = C( Δ v/ Δ t)
28 µ A = C × (3.55 V/6 ms)
C = 47 nF
Copyright © 2006 – 2008, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Link(s): TPL9202