SN28837
1/2-INCH PAL TIMER
SOCS031B – JULY 1991
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 7 V
DD
Input voltage range, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V
+ 0.3 V
+ 0.3 V
I
DD
DD
Output voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to V
O
Continuous total power dissipation at (or below) T = 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 mW
Operating free-air temperature range, T
Storage temperature range, T
Lead temperature 1,6 mm (1/16 in) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20°C to 45°C
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C
STG
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to GND.
recommended operating conditions
MIN
NOM
MAX
UNIT
V
Supply voltage, V
4.5
5
5.5
DD
High-level input voltage, V
V
DD
x 0.7
V
IH
Low-level input voltage, V
Operating frequency
Power-up time
0.8
V
IL
13.375
300
MHz
µs
Operating free-air temperature, T
–20
45
°C
A
electrical characteristics over recommended operating ranges of supply voltage and free-air
‡
temperature (unless otherwise noted)
PARAMETER
GT3/SH2 and GT1/SH3
All other outputs
TEST CONDITIONS
MIN
3.5
TYP
MAX
UNIT
V
V
V
V
V
V
= 4.5 V,
= 4.5 V,
= 4.5 V,
= 4.5 V,
I
I
I
I
= –4 mA
= –2 mA
= 4 mA
DD
DD
DD
DD
OH
OH
OL
OL
V
V
V
OH
3.5
GT3/SH2 and GT1/SH3
All other outputs
0.5
0.5
1
V
OL
§
= 2 mA
I
I
I
I
= 5 V
= 0
µA
µA
IH
IH
IL
–30 –200 –500
IL
Average supply current
Standby supply current
10
1
30
mA
mA
DD(AV)
DD(S)
‡
§
The HCR, SB, and VCR inputs are Schmitt-trigger inputs with 0.1-V to 1-V hysteresis.
All inputs except X1 have pullup-current sources.
switching characteristics over recommended operating free-air temperature range, V
= 5 V
DD
PARAMETER
TEST CONDITIONS
MIN
TYP
4.458333
75
MAX
UNIT
MHz
ns
f
t
Frequency
S1, S2, S3, SH1, GT2, GT1/SH3, GT3/SH2
S1, S2, S3, SH1, GT2, GT1/SH3, GT3/SH2
GT1/SH3 and GT3/SH2
All other outputs
clock
C
C
= 50 pF
= 50 pF
L
L
Pulse duration
w
10
t
Rise time
Fall time
ns
ns
r
f
50
GT1/SH3 and GT3/SH2
All other outputs
10
t
50
6
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