DS89C420-ENG Maxim Integrated Products, DS89C420-ENG Datasheet - Page 6

• Manufacturer Part Number: DS89C420-ENG
• Description: IC MCU ULTRA 25MHZ HP 44-TQFP
• Manufacturer: Maxim Integrated Products
• Series: 89Cr

Specifications of DS89C420-ENG

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SIO, UART/USART
• Peripherals: Power-Fail Reset, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Port 2 Address to Valid
Data In (Note 2)
ALE Low to RD or WR Low
(Note 2)
Port 0 Address Valid to RD
or WR Low (Note 2)
Port 2 Address Valid to RD
or WR Low (Note 2)
Data Out Valid to WR
Transition (Note 1)
Data Hold After WR
(Note 1)
RD or WR High to ALE High
(Note 1)
*Specifications to -40°C are guaranteed by design and not production tested.
PARAMETER
SYMBOL
(t
(
(
t
(
t
t
t
t
t
t
t
AVDV2
t
t
AVWL0)
AVRL0
AVRL2
AVWL2)
QVWX
WHQX
WHLH)
RHLH
LLRL
LLWL)
0 + t
0.5t
t
+ t
STC2
MIN
CLCL
20
PAGE MODE 1
STC5
-5
STC2
- 2
1 CYCLE
- 8
- 5
0.5t
t
CLCL
t
STC2
+ t
MAX
t
CLCL
STC1
- 16 +
STC2
+ 6
+ 1
2t
0.5t
t
CLCL
+ t
STC2
MIN
t
STC2
CLCL
PAGE MODE 1
20
-5
STC5
- 8 +
- 2
2 CYCLE
- 5
2t
16 + t
1.5t
t
CLCL
STC2
MAX
t
STC2
CLCL
+ 8 +
+ 6
STC1
6 of 47
-
4t
1.5t
t
CLCL
+ t
STC2
MIN
t
CLCL
STC2
20
PAGE MODE 1
-5
STC5
- 8 +
- 2
4 CYCLE
- 5
4t
16 + t
3.5t
t
CLCL
STC2
MAX
t
STC2
CLCL
+ 8 +
+ 6
STC1
-
0.5t
1.5t
t
CLCL
t
STC2
CLCL
CLCL
MIN
t
t
t
STC2
STC2
STC5
20
PAGE MODE 2
-5
- 5 +
- 2
- 8 +
- 5 +
DS89C420 Ultra-High-Speed Microcontroller
0.5t
16 + t
3.0t
t
STC2
+ t
MAX
CLCL
CLCL
STC2
+ 6
STC1
+ 4
-
0.5t
1.5t
t
CLCL
t
STC2
NON-PAGE MODE
CLCL
CLCL
MIN
t
t
t
STC2
STC2
STC5
20
-5
- 5 +
- 2
- 8 +
- 5 +
0.5t
20 + t
3.5t
t
STC2
+ t
MAX
CLCL
CLCL
STC2
+ 6
STC1
+ 4
-
UNITS
ns
ns
ns
ns
ns
ns
ns