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2
7.20 I
C Slave Requirements and Characteristics (continued)
Recommended operating conditions; T
PARAMETER
2
TLOW
I
C clock low time
2
TSUDAT
I
C serial data setup time
2
THDDAT
I
C serial data hold time
2
TVDDAT
I
C valid data time
2
TVDACK
I
C valid data time of ACK condition
2
TOCF
I
C output fall time
2
TBUF
I
C bus free time between stop and start
2
TSTS
I
C start or repeated start-condition setup time
2
TSTH
I
C start or repeated start-condition hold time
2
TSPS
I
C stop condition setup time
SDA AND SCL FAST MODE CHARACTERISTICS
2
FSCL
I
C clock frequency
2
THIGH
I
C clock high time
2
TLOW
I
C clock low time
2
TSUDAT
I
C serial data setup time
2
THDDAT
I
C serial data hold time
2
TVDDAT
I
C valid data time
2
TVDACK
I
C valid data time of ACK condition
2
TOCF
I
C output fall time
2
TBUF
I
C bus free time between stop and start
2
TSTS
I
C start or repeated start-condition setup time
2
TSTH
I
C start or repeated start-condition hold time
2
TSPS
I
C stop condition setup time
7.21 SPI Controller Characteristics
Recommended operating conditions; T
PARAMETER
FSPI
Frequency of SPI_CLK
TPER
Period of SPI_CLK (1/F_SPI)
TWHI
SPI_CLK high width
TWLO
SPI_CLK low width
TDACT
SPI_SZZ falling to SPI_CLK rising delay time
TDINACT
SPI_CLK falling to SPI_CSZ rising delay time
TDPICO
SPI_CLK falling to SPI_PICO Valid delay time
TSUPOCI
SPI_POCI valid to SPI_CLK falling setup time
THDMSIO
SPI_CLK falling to SPI_POCI invalid hold time
TRSPI
SPI_CSZ/CLK/PICO rise time
TFSPI
SPI_CSZ/CLK/PICO fall time
Copyright © 2021 Texas Instruments Incorporated
= –40°C to +105°C unless otherwise noted
A
SCL low to SDA output valid
ACK signal from SCL low to SDA (out)
low
10-pF to 400-pF bus
SCL low to SDA output valid
ACK signal from SCL low to SDA (out)
low
10-pF to 400-pF bus, VDD = 3.3 V
10-pF to 400-pF bus, VDD = 1.8 V
= –40°C to +105°C unless otherwise noted
A
10% to 90%, C
LDO_3V3 = 3.3 V
90% to 10%, C
LDO_3V3 = 3.3 V
Product Folder Links:
SLVSDC2C – FEBRUARY 2016 – REVISED AUGUST 2021
TEST CONDITIONS
TEST CONDITIONS
= 5 pF to 50 pF,
L
= 5 pF to 50 pF,
L
TPS65981
TPS65981
MIN
TYP
MAX
UNIT
4.7
μs
250
ns
0
ns
3.4
μs
3.4
μs
250
ns
4.7
μs
4.7
μs
4
μs
4
μs
0
400
kHz
0.6
μs
1.3
μs
100
ns
0
ns
0.9
μs
0.9
μs
12
250
ns
6.5
250
1.3
μs
0.6
μs
0.6
μs
0.6
μs
MIN
TYP
MAX
UNIT
11.82
12 12.18
MHz
82.1 83.33
84.6
ns
30
ns
30
ns
30
50
ns
160
180
ns
–5
5
ns
21
ns
0
ns
0.1
8
ns
0.1
8
ns
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