W78E052DDG Nuvoton Technology Corporation of America, W78E052DDG Datasheet - Page 72

• Manufacturer Part Number: W78E052DDG
• Description: IC MCU 8-BIT 8K FLASH 40-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78E052DDG

• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 36
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

*1: Typical values are not guaranteed. The values listed are tested at room temperature and based on
a limited number of samples.
*2: Pins of ports 1~4 source a transition current when they are being externally driven from 1 to 0.
The transition current reaches its maximum value when V
*3: Under steady state (non-transient) conditions, I
*4: If I
*5: Tested while CPU is kept in reset state and EA=H, Port0=H.
Voltage
4.5-5.5V
4.5-5.5V
2.4V
2.4V
21.3 AC ELECTRICAL CHARACTERISTICS
The AC specifications are a function of the particular process used to manufacture the part, the ratings
of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the specifications
can be expressed in terms of multiple input clock periods (TCP), and actual parts will usually experi-
ence less than a ±20 nS variation.
21.3.1 Clock Input Waveform
Notes:
1. The clock may be stopped indefinitely in either state.
2. The TCP specification is used as a reference in other specifications.
PARAMETER
Operating Speed
Clock Period
Clock High
Clock Low
If I
OH
OL
Maximum I
Maximum I
Maximum total I
exceeds the test condition, V
exceeds the test condition, V
OL
OL
XTAL1
per port pin: 20mA
per 8-bit port: 40mA
OL
Max. Frequency
40MHz
20MHz
20MHz
10MHz
for all outputs: 100mA
SYMBOL
Fop
TCP
Tch
Tcl
Frequency VS Voltage Table
OL
OH
W78E054D/W78E052D/W78E051D Data Sheet
will be higher than the listed specification.
will be lower than the listed specification.
T
CH
MIN.
0
25
10
10
- 72 -
OL
6T/12T mode
12T
6T
12T
6T
F
OP,
must be externally limited as follows:
IN
T
CP
TYP.
-
-
-
-
is approximately 2V.
T
CL
MAX.
40
-
-
-
Note
UNIT
MHz
nS
nS
nS
NOTES
1
2
3
3