PCF85321 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF85321' PDF : 44 Pages View PDF
NXP Semiconductors
PCF8532
Universal LCD driver for low multiplex rates
11. Dynamic characteristics
Table 18. Dynamic characteristics
VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 8.0 V; Tamb = −40 °C to +85 °C; unless otherwise specified.
Symbol
Parameter
Conditions
Min Typ Max
fclk
fclk(ext)
tclk(H)
tclk(L)
clock frequency
external clock frequency
HIGH-level clock time
LOW-level clock time
on pin CLK; see Table 15
external clock source used
external clock source used
[1]
900
1800 3000
[2]
700
-
5000
100 -
-
100 -
-
tPD(SYNC_N) SYNC propagation delay
tSYNC_NL
SYNC LOW time
tPD(drv)
driver propagation delay
Timing characteristics: I2C-bus
VLCD = 5 V
-
30
-
100 -
-
-
10
-
[3]
fSCL
SCL clock frequency
tBUF
bus free time between a
STOP and START condition
-
-
400
1.3
-
-
tHD;STA
hold time (repeated) START
condition
0.6
-
-
tSU;STA
set-up time for a repeated
START condition
0.6
-
-
tVD;ACK
tHIGH
tLOW
tf
tr
Cb
data valid acknowledge time
HIGH period of the SCL clock
LOW period of the SCL clock
fall time
of both SDA and SCL signals
rise time
of both SDA and SCL signals
capacitive load for each bus
line
-
-
1.2
0.6
-
-
1.3
-
-
-
-
0.3
-
-
0.3
-
-
400
tSU;DAT
tHD;DAT
tSU;STO
data set-up time
data hold time
set-up time for STOP
condition
200 -
-
0
-
-
0.6
-
-
tw(spike)
spike pulse width
-
-
50
Unit
Hz
Hz
µs
µs
ns
µs
µs
kHz
µs
µs
µs
µs
µs
µs
µs
µs
pF
ns
ns
µs
ns
[1] Typical output duty factor: 50 % measured at the CLK output pin.
[2] For fclk(ext) > 4 kHz it is recommended to use an external pull-up resistor between pin SYNC and pin VDD. The value of the resistor
should be between 100 kΩ and 1 MΩ. This resistor should be present even when no cascading configuration is used!
[3] All timing values are valid within the operating supply voltage and ambient temperature range and are referenced to VIL and VIH with an
input voltage swing of VSS to VDD.
PCF8532_1
Product data sheet
Rev. 1 — 10 February 2009
© NXP B.V. 2009. All rights reserved.
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