IA8044/IA8344
Data Sheet
SDLC Communications Controller
March 30, 2010
3.
Maximum Ratings and DC Characteristics
The IA8044/IA8344 absolute maximum ratings and DC characteristics are provided in Tables 3
and 4, respectively.
Table 3. IA8044 and IA8344 Absolute Maximum Ratings
Parameter
Rating
Ambient temperature under bias −40°C to +85°C
Storage temperature
Power supply (VDD
Voltage on any pin to VSS
Power dissipation
−40°C to +150°C
−0.3 to +6VDC
−0.3 to (VDD +0.3)
2W
)
a
a
This device does not contain EPROM or its related programming circuitry. Therefore, this limit must be
adhered to especially for input pin EA, which is used as the programming voltage pin in the Intel device.
Exceeding the listed maximum voltage will cause damage to the device.
Table 4. IA8044 and IA8344 DC Characteristics
Symbol
VIL
Parameter
Input Low Voltage
Input High Voltage
Min Typ Max Unit
–
2.0
–
–
–
0.8
–
V
V
VIH
VOL Output Low Voltage (IOL= 4mA)
VOH Output High Voltage (IOH= 4mA)
RPU Pull-Up Resistance (Ports 1, 2, 3)
RPD Pull-Down Resistance (RST)
–
0.4
–
V
3.5
–
–
V
50
50
–
KW
KW
µA
µA
–
–
IIL
Input Low Current (Ports 1, 2, 3)
Input Low Current (PO, EA)
Input High Current (RST)
−200 –
1
IIL1
IIH
−1
−1
−1
−10
–
–
–
–
–
–
4
1
200 µA
µA
IIH1
IOZ
ICC
CIO
Input High Current (PO, EA)
Tri-state Leakage Current (Port 0)
Power Supply Current (@ 12 MHz)
Pin Capacitance
1
10 µA
50 mA
–
–
pF
4.
Functional Description
4.1
Functional Block Diagram
A functional block diagram of the IA8044 and IA8344 is shown in Figure 5. Descriptions of the
functional modules are provided in the following subsections.
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