PCF8578 Philips Semiconductors, PCF8578 Datasheet - Page 27

• Manufacturer Part Number: PCF8578
• Description: LCD row/column driver for dot matrix graphic displays
• Manufacturer: Philips Semiconductors

Philips Semiconductors
12 DC CHARACTERISTICS
V
Notes
1. Outputs are open; inputs at V
2. Resets all logic when V
3. Periodically sampled; not 100% tested.
4. Resistance measured between output terminal (R0 to R7, R8/C8 to R31/C31 and C32 to C39) and bias input
1998 Sep 08
Supplies
V
V
I
I
V
Logic
V
V
I
I
I
I
I
C
LCD outputs
I
V
R
R
DD1
DD2
OL1
OH1
OL2
L1
L2
L3
DD
SYMBOL
DD
LCD
POR
IL
IH
DC
i
ROW
COL
LCD row/column driver for dot matrix
graphic displays
(V
(see Table 2):
a) V
b) Row mode, R0 to R7 and R8/C8 to R31/C31: V
c) Column mode, R8/C8 to R31/C31 and C32 to C39: V
= 2.5 to 6 V; V
2
to V
op
= V
5
, V
supply voltage
LCD supply voltage
supply current external clock
supply current internal clock
power-on reset level
LOW level input voltage
HIGH level input voltage
LOW level output current at SYNC
and CLK
HIGH level output current at SYNC
and CLK
LOW level output current at SDA
leakage current at SDA, SCL, SYNC,
CLK, TEST and SA0
leakage current at OSC
input capacitance at SCL and SDA
leakage current at V
DC component of LCD drivers
R0 to R7, R8/C8 to R31/C31 and
C32 to C39
output resistance R0 to R7 and
R8/C8 to R31/C31
output resistance R8/C8 to R31/C31
and C32 to C39
DD
DD
and V
SS
V
LCD
= 0 V; V
LCD
PARAMETER
= 9 V.
DD
) when the specified current flows through one output under the following conditions
LCD
< V
DD
= V
POR
2
to V
or V
DD
.
5
SS
3.5 V to V
; I
2
C-bus inactive; external clock with 50% duty factor.
DD
f
R
note 2
V
V
V
V
V
note 3
V
row mode; note 4
column mode; note 4
CLK
OL
OH
OL
i
i
i
OSC
2
= V
= V
= V
= 1 V; V
= 0.4 V; V
9 V; T
= 2 kHz; note 1
CONDITIONS
= 4 V; V
V
27
= 330 k
DD
DD
DD
LCD
3
or V
or V
amb
V
DD
DD
LCD
6.65 V; V
SS
LCD
= 40 to +85 C; unless otherwise specified.
DD
= 5 V
= 5 V
= 5 V
4.70 V; V
5
2.5
V
0.8
V
0.7V
1
3
V
2
DD
SS
LCD
MIN.
4
DD
V
9
2.35 V; I
LCD
6
20
1.3
1.5
3
20
TYP.
4.30 V; I
LOAD
Product specification
6.0
V
15
50
0.3V
V
+1
+1
5
+2
3
6
1.8
= 150 A.
LOAD
1
DD
DD
MAX.
PCF8578
DD
= 100 A.
3.5 V
V
V
V
V
mA
mA
mA
mA
pF
mV
k
k
UNIT
A
A
A
A