Rev. 1.00

7

November 22, 2011

HT16C21

A.C. Characteristics

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Condition

LCD Frame Frequency

4V

1/4duty, Ta =25°C

72

80

88

Hz

LCD Frame Frequency

4V

1/4duty, Ta =25°C

144

160

176

Hz

LCD Frame Frequency

4V

1/4duty, Ta=- 40 to +85°C

52

80

124

Hz

LCD Frame Frequency

4V

1/4duty, Ta=-40 to +85°C

104

160

248

Hz

—

20

—

—

ms

—

—

0.05

—

—

V/ms

Note: 1. If the conditions of Power on Reset timing are not satisfied during the power ON/OFF sequence, the

internal Power on Reset (POR) circuit will not operate normally.

remain at 0V for 20ms (min.) before rising to the normal operating voltage.

Symbol

Parameter

Condition

Unit

Min.

Max.

Min.

Max.

Clock Frequency

—

—

100

—

400

kHz

Bus Free Time

Time in which the bus

must be free before a new

transmission can start

4.7

—

1.3

—

μs

Start Condition Hold Time

After this period, the first

clock pulse is generated

4

—

0.6

—

μs

SCL Low Time

—

4.7

—

1.3

—

μs

SCL High Time

—

4

—

0.6

—

μs

Start Condition Setup Time Only relevant for repeated

START condition

4.7

—

0.6

—

μs

Data Hold Time

—

0

—

0

—

ns

Data Setup Time

—

250

—

100

—

ns

SDA and SCL Rise Time

Note

—

1

—

0.3

μs

SDA and SCL Fall Time

Note

—

0.3

—

0.3

μs

Stop Condition Set-up Time

—

4

—

0.6

—

μs

Output Valid from Clock

—

—

3.5

—

0.9

μs

Input Filter Time Constant

(SDA and SCL Pins)

Noise suppression time

—

100

—

50

ns

Note: These parameters are periodically sampled but not 100% tested.