DATASHEET
X5648, X5649 (Replaces X25648, X25649)
FN8136
Rev 0.00
March 17, 2005
CPU Supervisor with 64Kbit SPI EEPROM
FEATURES
DESCRIPTION
• Low VCC detection and reset assertion
—Five standard reset threshold voltages
—Re-program low VCC reset threshold voltage
using special programming sequence
—Reset signal valid to VCC = 1V
• Long battery life with low power consumption
— 3.3V, IOL = 2.1mA
2V < VCC 3.3V, IOL = 1mA
2V < VCC 3.3V, IOH = –0.4mA
VOH2
Output HIGH voltage
VCC - 0.4
V
VOH3
Output HIGH voltage
VCC - 0.2
V
VCC 2V, IOH = -0.25mA
VOLS
Reset output LOW voltage
V
IOL = 1mA
0.4
CAPACITANCE TA = +25°C, f = 1MHz, VCC = 5V
Symbol
COUT
CIN
(2)
(2)
Test
Max.
Unit
Conditions
Output capacitance (SO, RESET/RESET)
8
pF
VOUT = 0V
Input capacitance (SCK, SI, CS, WP)
6
pF
VIN = 0V
Notes: (1) VIL min. and VIH max. are for reference only and are not tested.
(2) This parameter is periodically sampled and not 100% tested.
FN8136 Rev 0.00
March 17, 2005
Page 10 of 18
X5648, X5649 (Replaces X25648, X25649)
EQUIVALENT A.C. LOAD CIRCUIT AT 5V VCC
5V
5V
4.6k
2.06k
Output
A.C. TEST CONDITIONS
Input pulse levels
VCC x 0.1 to VCC x 0.9
Input rise and fall times
10ns
Input and output timing level
VCC x 0.5
RESET/RESET
3.03k
30pF
100pF
A.C. CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified)
Serial Input Timing
2.7-5.5V
Symbol
Parameter
Min.
Max.
Unit
0
2
MHz
fSCK
Clock frequency
tCYC
Cycle time
500
ns
tLEAD
CS lead time
250
ns
tLAG
CS lag time
250
ns
tWH
Clock HIGH time
200
ns
tWL
Clock LOW time
250
ns
tSU
Data setup time
50
ns
tH
Data hold time
50
ns
tRI(3)
tFI(3)
Input rise time
100
ns
Input fall time
100
ns
tCS
tWC
(4)
CS deselect time
500
ns
Write cycle time
10
ms
Serial Input Timing
tCS
CS
tLEAD
tLAG
SCK
tSU
SI
SO
FN8136 Rev 0.00
March 17, 2005
tH
MSB IN
tRI
tFI
LSB IN
High Impedance
Page 11 of 18
X5648, X5649 (Replaces X25648, X25649)
Serial Output Timing
2.7-5.5V
Symbol
Parameter
Min.
Max.
Unit
0
2
MHz
fSCK
Clock frequency
tDIS
Output disable time
250
ns
Output valid from clock low
250
ns
tV
tHO
Output hold time
tRO(3)
tFO(3)
Output rise time
100
ns
Output fall time
100
ns
0
ns
Notes: (3) This parameter is periodically sampled and not 100% tested.
(4) tWC is the time from the rising edge of CS after a valid write sequence has been sent to the end of the self-timed internal nonvolatile
write cycle.
Serial Output Timing
CS
tCYC
tWH
tLAG
SCK
tV
SO
SI
tHO
MSB Out
tWL
MSB–1 Out
tDIS
LSB Out
ADDR
LSB IN
Power-Up and Power-Down Timing
VCC
VTRIP
VTRIP
tPURST
0 Volts
tPURST
tR
tF
tRPD
RESET (X5648)
RESET (X5649)
FN8136 Rev 0.00
March 17, 2005
Page 12 of 18
X5648, X5649 (Replaces X25648, X25649)
RESET Output Timing
Symbol
VTRIP
VTH
Parameter
Reset trip point voltage, X5648-4.5A, X5648-4.5A
Reset trip point voltage, X5648, X5649
Reset trip point voltage, X5648-2.7A, X5649-2.7A
Reset trip point voltage, X5648-2.7, X5649-2.7
Power-up reset time out
tRPD(5)
VCC detect to reset/output
Max.
Unit
4.5
4.25
2.85
2.55
4.63
4.38
2.93
2.63
4.75
4.5
3.0
2.7
V
100
200
20
mV
280
ms
500
ns
(5)
VCC fall time
100
µs
(5)
VCC rise time
100
µs
1
V
tR
VRVALID
Note:
Typ.
VTRIP hysteresis (HIGH to LOW vs. LOW to HIGH VTRIP voltage)
tPURST
tF
Min.
Reset valid VCC
(5) This parameter is periodically sampled and not 100% tested.
VTRIP Set Conditions
tTHD
VCC
VTRIP
tTSU
tVPS
CS
tVPS
tRP
tP
tVPH
tVPH
tVPO
VP
SCK
VP
tVPO
SI
FN8136 Rev 0.00
March 17, 2005
Page 13 of 18
X5648, X5649 (Replaces X25648, X25649)
VTRIP Reset Conditions
VCC*
tRP
tP
tVPS
CS
tVPS
tVP1
tVPH
tVPO
VCC
SCK
VP
tVPO
SI
*VCC > Programmed VTRIP
VTRIP Programming Specifications VCC = 1.7-5.5V; Temperature = 0°C to 70°C
Parameter
Description
Min.
Max.
Unit
tVPS
SCK VTRIP program voltage setup time
1
µs
tVPH
SCK VTRIP program voltage hold time
1
µs
VTRIP program pulse width
1
µs
tTSU
VTRIP level setup time
10
µs
tTHD
VTRIP level hold (stable) time
10
ms
tWC
VTRIP write cycle time
tRP
VTRIP program cycle recovery period (between successive programming cycles)
tVPO
SCK VTRIP program voltage off time before next cycle
0
Programming voltage
15
18
V
VTRIP programed voltage range
1.7
5.0
V
Vta1
Initial VTRIP program voltage accuracy (VCC applied - VTRIP) (programmed at 25°C)
-0.1
+0.4
V
Vta2
Subsequent VTRIP program voltage accuracy [(VCC applied - Vta1) - VTRIP)
(programmed at 25°C)
-25
+25
mV
Vtr
VTRIP program voltage repeatability (successive program operations) (programmed at
25°C)
-25
+25
mV
Vtv
VTRIP program variation after programming (0 - 75°C). (programmed at 25°C.)
-25
+25
mV
tP
VP
VTRAN
10
10
ms
ms
ms
VTRIP programming parameters are periodically sampled and are not 100% tested.
FN8136 Rev 0.00
March 17, 2005
Page 14 of 18
X5648, X5649 (Replaces X25648, X25649)
TYPICAL PERFORMANCE
tPURST vs. Temperature
VCC Supply Current vs. Temperature (ISB)
205
18
200
Watchdog Timer On (VCC = 5V)
16
195
14
Isb (µA)
Time (ms)
190
12
Watchdog Timer On (VCC = 5V)
10
8
6
185
180
175
170
165
4
Watchdog Timer Off (VCC = 3V, 5V)
2
160
-40
0
-40
25
Temp (°C)
90
25
Degrees °C
90
VTRIP vs. Temperature (programmed at 25°C)
5.025
VTRIP = 5V
5.000
4.975
Voltage
3.525
VTRIP = 3.5V
3.500
3.475
2.525
VTRIP = 2.5V
2.500
2.475
0
FN8136 Rev 0.00
March 17, 2005
25
Temperature
85
Page 15 of 18
X5648, X5649 (Replaces X25648, X25649)
PACKAGING INFORMATION
8-Lead Plastic Dual In-Line Package Type P
0.430 (10.92)
0.360 (9.14)
0.260 (6.60)
0.240 (6.10)
Pin 1 Index
Pin 1
0.300
(7.62) Ref.
Half Shoulder Width On
All End Pins Optional
0.145 (3.68)
0.128 (3.25)
Seating
Plane
0.025 (0.64)
0.015 (0.38)
0.065 (1.65)
0.045 (1.14)
0.150 (3.81)
0.125 (3.18)
0.110 (2.79)
0.090 (2.29)
.073 (1.84)
Max.
Typ. 0.010 (0.25)
0.060 (1.52)
0.020 (0.51)
0.020 (0.51)
0.016 (0.41)
0.325 (8.25)
0.300 (7.62)
0°
15°
NOTE:
1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH
FN8136 Rev 0.00
March 17, 2005
Page 16 of 18
X5648, X5649 (Replaces X25648, X25649)
PACKAGING INFORMATION
14-Lead Plastic, SOIC, Package Code S14
0.150 (3.80) 0.228 (5.80)
0.158 (4.00) 0.244 (6.20)
Pin 1 Index
Pin 1
0.014 (0.35)
0.020 (0.51)
0.336 (8.55)
0.345 (8.75)
(4X) 7°
0.053 (1.35)
0.069 (1.75)
0.004 (0.10)
0.010 (0.25)
0.050 (1.27)
0.050"Typical
0.010 (0.25)
0.020 (0.50)
X 45°
0.050"Typical
0° - 8°
0.0075 (0.19)
0.010 (0.25)
0.250"
0.016 (0.410)
0.037 (0.937)
FOOTPRINT
0.030"Typical
14 Places
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
FN8136 Rev 0.00
March 17, 2005
Page 17 of 18
X5648, X5649 (Replaces X25648, X25649)
Ordering Information
VCC Range
VTRIP
Range
Package
Operating
Temperature Range
Part Number RESET
(Active LOW)
Part Number RESET
(Active HIGH)
4.5-5.5V
4.5.4.75
8 pin PDIP
0-70°C
X5648P-4.5A
X5649P-4.5A
14L SOIC
0-70°C
X5648S14-4.5A
X5649S14-4.5A
-40-85°C
X5648S14I-4.5A
X5649S14I-4.5A
8 pin PDIP
0-70°C
X5648P
X5649P
14L SOIC
0-70°C
X5648S14
X5649S14
-40-85°C
X5648S14I
X5649S14I
4.5-5.5V
4.25.4.5
2.7-5.5V
2.85-3.0
14L SOIC
0-70°C
X5648S14-2.7A
X5649S14-2.7A
2.7-5.5V
2.55-2.7
14L SOIC
0-70°C
X5648S14-2.7
X5649S14-2.7
Part Mark Information
X5648/49 W
X
Blank = 14-Lead SOIC
P = 8 Pin DIP
Blank = 5V ±10%, 0°C to +70°C, VTRIP = 4.25-4.5
AL = 5V±10%, 0°C to +70°C, VTRIP = 4.5-4.75
I = 5V ±10%, -40°C to +85°C, VTRIP = 4.25-4.5
AM = 5V ±10%, -40°C to +85°C, VTRIP = 4.5-4.75
F = 2.7V to 5.5V, 0°C to +70°C, VTRIP = 2.55-2.7
AN = 2.7V to 5.5V, 0°C to +70°C, VTRIP = 2.85-3.0
G = 2.7V to 5.5V, -40°C to +85°C, VTRIP = 2.55-2.7
AP = 2.7V to 5.5V, -40°C to +85°C, VTRIP = 2.85-3.0
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FN8136 Rev 0.00
March 17, 2005
Page 18 of 18