DS2251T-128-16# Maxim Integrated Products, DS2251T-128-16# Datasheet - Page 18

• Manufacturer Part Number: DS2251T-128-16#
• Description: IC MCU 128KB 16MHZ 72-SIMM
• Manufacturer: Maxim Integrated Products
• Series: DS225xr

Specifications of DS2251T-128-16#

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: Power-Fail Reset, WDT
• Number Of I /o: 32
• Program Memory Type: SRAM
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 72-SIMM
• Processor Series: DS2251T
• Core: 8051
• Data Bus Width: 8 bit
• Program Memory Size: 128 KB
• Data Ram Size: 128 KB
• Interface Type: UART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

RPC AC CHARACTERISTICS—DBB READ
(V
RPC AC CHARACTERISTICS—DBB WRITE
(V
AC CHARACTERISTICS—DMA
(V
AC CHARACTERISTICS—PROG
(V
61A
61B A
54
55
56
57
58
59
60
62
63
64
65
66
67
68
69
70
#
#
#
#
CC
CC
CC
CC
= 5V ±10%, T
= 5V ±10%, T
= 5V ±10%, T
= 5V ±10%, T
PARAMETER
PARAMETER
Data Setup to
Data Hold After
PARAMETER
PARAMETER
CS
CS
RD
CS
RD
RD
CS
CS
WR
DACK
RD
DACK
RD
PROG
PROG
0
, Hold After
, A
, A
, A
, A
, Hold After
Pulse Width
to Data Out Delay
to Data Float Delay
or
or
Pulse Width
0
0
0
0
Low to Active
High to Inactive
to
to Data Valid
WR
WR
Setup to
Hold After
to Data Out Delay
Setup to
WR
to
to DRQ Cleared
WR
or
DACK
WR
A
A
A
A
WR
RD
WR
WR
RD
= 0˚C to +70˚C.)
= 0˚C to +70˚C.)
= 0˚C to +70˚C.)
= 0˚C to +70˚C.)
RD
18 of 22
SYMBOL
SYMBOL
SYMBOL
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RDZ
ACC
CAC
ACD
CRQ
WW
PRA
AW
WA
WA
DW
WD
AD
PRI
AR
RA
RR
RD
MIN
MIN
MIN
MIN
160
130
20
20
20
48
48
0
0
0
0
0
0
0
0
MAX
MAX
MAX
MAX
130
130
130
110
85
UNITS
UNITS
UNITS
UNITS
CLKS
CLKS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns