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AY0438 Datasheet PDF : 11 Pages
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AY0438
2.0 ELECTRICAL CHARACTERISTICS
Maximum Ratings*
VDD.............................................................................................................................................................. -0.3V to +12V
Inputs (CLK, Data In, Load) ................................................................................................................. VCC to VDD +0.3V
LCDΦ Input ........................................................................................................................................ -0.3V to VDD +0.3V
Power Dissipation.................................................................................................................................................250 mW
Storage Temperature............................................................................................................................... -65˚C to +125˚C
Operating Temperature Industrial.............................................................................................................. -40˚C to +85˚C
* Exceeding these ratings could cause permanent damage to the device. This is a stress rating only and functional
operation of this device at these conditions is not implied. Operating ranges are specified in Standard Conditions.
Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Data labeled “typical” is presented for design guidance only and is not guaranteed.
TABLE 2: DC CHARACTERISTICS
VDD = +5V unless otherwise noted, TA = 40°C to +85°C
Characteristics
Sym
Min
Supply Voltage
Supply Current
Input High Level
Input Low Level
Clock
Data,
Input Leakage Current Load
Input Capacitance
Segment Output Voltage
LCDΦ Input High Level
LCDΦ Input Low Level
LCDΦ Input Leakage
VDD
IDD
VIH
VIL1
VIL2
IL
CI
VOH
VOL
VIN
VIL
IL
+3.0
—
—
0.5 VDD
0
0
—
—
0.8 VDD
0
0.9 VDD
0
—
Typ
—
25
13
—
—
—
0.01
—
—
—
—
—
—
TABLE 3: AC CHARACTERISTICS
Max
+8.5
60
30
VDD
0.1 VDD
0.1 VDD
±10
5.0
VDD
0.1 VDD
VDD
0.1 VDD
10
Units
Conditions
V
µA LCDΦ OSC < 15 kHz
µA LCDΦ OSC < 100 Hz
V
V 3.0V ≤ VDD ≤ 8.5V
V 3.0V ≤ VDD ≤ 8.5V
µA VIN = 0V and +5.0V
pF VDD = +5.0V
V IOH = -100 µA
V IOL = 100 µA
V
V
µA VIN = 0V and +5.0V
VDD = +5.0V
Characteristics
Clock Rate
Data Set-up Time
Data Hold Time
Load Pulse Width
Data Out Prop. Delay
Sym
Min
Typ
Max Units
Conditions
f
DC
—
tDS
150
—
tDH
50
—
tPW
175
—
tPD
—
—
1.5
MHz
50% duty cycle
—
nsec Data change to Clk falling edge
—
nsec
—
nsec
500
nsec CL = 55 pF
© 1995 Microchip Technology Inc.
DS70010I-page 7
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