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USE ULTRA37000™ FOR
ALL NEW DESIGNS
CY7C344B
Document #: 38-03036 Rev. *D
Page 2 of 12
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature .................................–65
°C to +135°C
Ambient Temperature with
Power Applied..............................................-65
°C to +135°C
Maximum Junction Temperature (Under Bias)............. 150
°C
Supply Voltage to Ground Potential[2]............ –2.0V to +7.0V
DC Output Current, per Pin[2] ...................–25 mA to +25 mA
DC Input Voltage[2] .........................................–2.0V to +7.0V
Operating Range[3]
Range
Ambient
Temperature
VCC
Commercial
–0
°C to +70°C
5V
±5%
Industrial
–40
°C to +85°C
5V
±10%
Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
Min.
Max.
Unit
VCC
Supply Voltage
Maximum VCC rise time is 10 ms
4.75(4.5)
5.25(5.5)
V
VOH
Output HIGH Voltage
IOH = –4.0 mA DC[4]
2.4
V
VOL
Output LOW Voltage
IOL = 8 mA DC[4]
0.45
V
VIH
Input HIGH Level
2.0
VCC+0.3
V
VIL
Input LOW Level
–0.3
0.8
V
IIX
Input Current
GND
≤ VIN ≤ VCC
–10
+10
µA
IOZ
Output Leakage Current
VO = VCC or GND
–40
+40
µA
tR
Recommended Input Rise Time
100
ns
tF
Recommended Input Fall Time
100
ns
Capacitance
Parameter
Description
Test Conditions
Max.
Unit
CIN
Input Capacitance
VIN = 0V, f = 1.0 MHz
10
pF
COUT
Output Capacitance
VOUT = 0V, f = 1.0 MHz
12
pF
AC Test Loads and Waveforms
Notes:
2. Minimum DC input is –0.3V. During transactions, the inputs may undershoot to –2.0V or overshoot to 7.0V for input currents less then 100 mA and periods
shorter than 20 ns.
3. The Voltage on any input or I/O pin cannot exceed the power pin during power-up.
4. The IOH parameter refers to high-level TTL output current; the IOL parameter refers to low-level TTL output current.
3.0V
5V
OUTPUT
R1 464
Ω
R2
250
Ω
50 pF
INCLUDING
JIGAND
SCOPE
GND
90%
10%
90%
10%
≤ 6 ns
≤ 6 ns
5V
OUTPUT
R1 464
Ω
R2
250
Ω
(a)
(b)
OUTPUT
1.75V
Equivalent to:
THÉVENIN EQUIVALENT (commercial)
ALL INPUT PULSES
tf
5pF
tR
tF
163
Ω
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