December 1994
14
Philips Semiconductors
Objective specification
Battery charge level indicator
SAA1501T
f
osc
oscillator frequency
3.9
4.3
4.7
kHz
Temperature control (pins 11 and 12)
V
i
I
TEMP2
/I
TEMP1
I
TEMP2
/I
TEMP1
c
input voltage
detection at T
max
detection at T
self
multiplication factor for
I
TEMP1
0
9.7
15
0.45
10.0
16
0.54
900
10.3
17
0.63
mV
V
11
= V
12
= 300 mV
V
11
= V
12
= 300 mV
I
TEMP1
= c
×
I
ref
(where c is constant);
V
TEMP1
= V
TEMP2
= 300 mV
I
TEMP2
= d
×
I
ref
(where d is constant);
V
TEMP1
= V
TEMP2
= 300 mV
d
multiplication factor for
I
TEMP2
4.5
5.4
6.3
Open battery protection
V
CC(ob)
open-battery level voltage
4.3
4.5
4.65
V
Testing
V
test
test level voltage
1.0
2.0
V
Display decoder driver
I
OL1
LOW level output current
(pin 20 LED),
(LED 20 is on)
output LED sense current
(pin 21 LED),
(LED 20 is on)
LED current
compensation factor
LOW level output current
(pins 20 to 16 LED),
(all LEDs are on)
total output sense current
(pins 21)
LED current
compensation factor
output current
(pins 20 to 16 LCD)
LOW level output current
(pins 14 and 15)
LOW level output current
(pins 22 and 23 LED)
LOW level output current
(pin 21 LCD)
HIGH level output current
(pins 20 to 16 LED)
HIGH level output current
(pin 21 LED)
V
OL
= 0.6 V; L40 to L100 off;
V
CC
= 2.4 V
7
10
12
mA
I
OBP
V
OBP
= 0.1 V; L40 to L100
off; V
CC
= 2.4 V
63
82
100
μ
A
I
LED(CF)
I
OL1
/I
OBP
; V
CC
= 2.4 V
110
121
132
I
OL2
all LEDs on; V
OL
= 0.7 V;
V
CC
= 2.8 V
7.5
11
14
mA
I
OBP(tot)
V
OBP
= 0.1 V; V
CC
= 2.8 V;
L20 to L100 on
5I
OL2
/I
OBP(tot)
350
452
560
μ
A
I
LED(CF)
115
125
135
I
OL
V
OL
= 0.5 V; V
CC
= 2.8 V
350
480
640
μ
A
I
OL(14,15)
V
OL
= 0.4 V; V
CC
= 2.4 V
0.9
1.2
1.7
mA
I
OL(22,23)
V
OL
= 0.4 V; V
CC
= 2.1 V
7
10
12
mA
I
OL(21)
V
OL
= 0.4 V; V
CC
= 2.8 V
572
849
1214
μ
A
I
OH
V
OH
= 2.4 V; V
CC
= 2.8 V
261
378
526
μ
A
I
OH(21)
V
OH
= 2.4 V; V
CC
= 2.8 V
239
378
565
μ
A
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT