Philips Semiconductors
Product specification
LCD direct/duplex driver with
I2C-bus interface
PCF8577C
11 AC CHARACTERISTICS
VDD = 2.5 to 6 V; Tamb = −40 to 85 °C; unless otherwise specified. All the timing values are valid within the operating
supply voltage and ambient temperature range and refer to VIL and VIH with an input voltage swing of VSS to VDD
.
SYMBOL
PARAMETER
display frequency
CONDITIONS
MIN.
TYP.(1)
90
MAX.
120
UNIT
Hz
fLCD
tBS
Cosc = 680 pF; Rosc = 1 MΩ 65
driver delays with test loads
VDD = 5 V
−
20
100
µs
I2C-bus
fSCL
SCL clock frequency
−
−
−
−
−
−
−
−
−
−
−
−
−
100
100
−
kHz
ns
µs
µs
µs
µs
µs
µs
µs
ns
ns
µs
tSW
tolerable spike width on I2C-bus Tamb = 25 °C
I2C-bus free time
−
tBUF
4.7
4.0
4.0
4.7
4.0
−
tSU;STA
tHD;STA
tLOW
tHIGH
tr
START condition set-up time
START condition hold time
SCL LOW time
−
−
−
SCL HIGH time
−
SCL and SDA rise time
SCL and SDA fall time
data set-up time
1.0
0.3
−
tf
−
tSU;DAT
tHD;DAT
tSU;STO
250
0
data hold time
−
STOP condition set-up time
4.0
−
Note
1. Typical conditions: VDD = 5 V; Tamb = 25 °C.
1.5 kΩ
6.8 kΩ
SCL, SDA
V
S32 to S1
(pins 1 to 32)
(V
V
) / 2
DD
DD
SS
(pins 39, 40)
MGA730
Fig.12 Test loads.
1998 Jul 30
14
NXP [ NXP ]
