25XX040
25XX040
25XX040
25AA040/25LC040/25C040
4K SPI Bus Serial EEPROM
Communication to the device can be paused via the
Device Selection Table
hold pin (HOLD). While the device is paused, transi-
tions on its inputs will be ignored, with the exception of
Part VCC Max. Clock Temp.
Number Range Frequency Ranges Chip Select, allowing the host to service higher priority
interrupts. Also, write operations to the device can be
25AA040 1.8-5.5V 1 MHz I
disabled via the write-protect pin (WP).
25LC040 2.5-5.5V 2 MHz I
Package Types
25C040 4.5-5.5V 3 MHz I,E
PDIP
CS 1 8 VCC
Features
SO 2 7 HOLD
Low-power CMOS technology
WP 3 6 SCK
- Write current: 3 mA typical
VSS 4 5 SI
- Read current: 500 A typical
- Standby current: 500 nA typical SOIC
CS 1 8 VCC
512 x 8-bit organization
SO 2 7 HOLD
16 byte page
WP 3 6 SCK
Write cycle time: 5 ms max.
VSS 4 5 SI
Self-timed ERASE and WRITE cycles
Block write protection
TSSOP
- Protect none, 1/4, 1/2 or all of array
1 8
HOLD SCK
Built-in write protection
2 7
VCC SI
- Power on/off data protection circuitry
3 6
CS VSS
- Write enable latch
4 5
SO WP
- Write-protect pin
Sequential read
Block Diagram
High reliability
Status
- Endurance: 1M cycles
HV Generator
Register
- Data retention: > 200 years
- ESD protection: > 4000V
8-pin PDIP, SOIC, and TSSOP packages
Temperature ranges supported:
EEPROM
- Industrial (I): -40Cto +85C
Memory
I/O Control
Array
- Automotive (E) (25C040): -40C to +125C
Control
Logic
XDEC
Logic
Description
Page
Latches
The Microchip Technology Inc. 25AA040/25LC040/
*
25C040 (25XX040) is a 4 Kbit serial Electrically
SI
Erasable PROM. The memory is accessed via a simple
SO Y Decoder
Serial Peripheral Interface (SPI) compatible serial
bus. The bus signals required are a clock input (SCK)
CS
plus separate data in (SI) and data out (SO) lines.
SCK
Access to the device is controlled through a Chip
Sense Amp.
HOLD
Select (CS) input. R/W Control
WP
*25XX040 is used in this document as a generic part number
VCC
for the 25AA040/25LC040/25C040 devices. SPI is a VSS
trademark of Motorola Corporation.
2003 Microchip Technology Inc. DS21204D-page 125AA040/25LC040/25C040
1.0 ELECTRICAL CHARACTERISTICS
()
Absolute Maximum Ratings
VCC.............................................................................................................................................................................7.0V
All inputs and outputs w.r.t. VSS .......................................................................................................... -0.6V to VCC+1.0V
Storage temperature .................................................................................................................................-65C to 150C
Ambient temperature under bias...............................................................................................................-65C to 125C
ESD protection on all pins......................................................................................................................................... 4 KV
NOTICE: Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an
extended period of time may affect device reliability
TABLE 1-1: DC CHARACTERISTICS
Industrial (I): TA = -40C to +85C VCC = 1.8V to 5.5V
DC CHARACTERISTICS
Automotive (E): TA = -40C to +125C VCC = 4.5V to 5.5V (25C040 only)
Param.
Sym. Characteristic Min. Max. Units Test Conditions
No.
D001 VIH1 High-level input 2.0 VCC+1 V VCC 2.7V (Note)
voltage
D002 VIH2 0.7 VCC VCC+1 V VCC< 2.7V (Note)
D003 VIL1 Low-level input -0.3 0.8 V VCC 2.7V (Note)
voltage
D004 VIL2 -0.3 0.3 VCC VVCC < 2.7V (Note)
D005 VOL Low-level output 0.4 VIOL = 2.1 mA
voltage
D006 VOL 0.2 VIOL = 1.0 mA, VCC < 2.5V
D007 VOH High-level output VCC -0.5 V IOH =-400 A
voltage
D008 ILI Input leakage current 1 ACS = VCC, VIN = VSS TO VCC
D009 ILO Output leakage 1 ACS = VCC, VOUT = VSS TO VCC
current
D010 CINT Internal Capacitance A = 25C, CLK = 1.0 MHz,
7 pFT
(all inputs and VCC = 5.0V (Note)
outputs)
D011 ICC Read Operating Current 1 mA VCC = 5.5V; FCLK = 3.0 MHz; SO = Open
500 A VCC = 2.5V; FCLK = 2.0 MHz; SO = Open
D012 ICC Write 5 mA VCC = 5.5V
3 mA VCC = 2.5V
D013 ICCS Standby Current 5 A CS = VCC = 5.5V, Inputs tied to VCC or
1 A VSS
CS = VCC = 2.5V, Inputs tied to VCC or
VSS
Note: This parameter is periodically sampled and not 100% tested.
DS21204D-page 2 2003 Microchip Technology Inc.