CAT25010, CAT25020, CAT25040
www.onsemi.com
10
Hold Operation
The HOLD input can be used to pause communication
between host and CAT25010/20/40. To pause, HOLD
must
be taken low while SCK is low (Figure 11). During the hold
condition the device must remain selected (CS
low). During
the pause, the data output pin (SO) is tri−stated (high
impedance) and SI transitions are ignored. To resume
communication, HOLD
must be taken high while SCK is low.
Design Considerations
The CAT25010/20/40 devices incorporate Power−On
Reset (POR) circuitry which protects the internal logic
against powering up in the wrong state. The device will
power up into Standby mode after V
CC
exceeds the POR
trigger level and will power down into Reset mode when
V
CC
drops below the POR trigger level. This bi−directional
POR behavior protects the device against ‘brown−out’
failure following a temporary loss of power.
The CAT25010/20/40 device powers up in a write disable
state and in a low power standby mode. A WREN instruction
must be issued prior to any writes to the device.
After power up, the CS
pin must be brought low to enter
a ready state and receive an instruction. After a successful
byte/page write or status register write, the device goes into
a write disable mode. The CS
input must be set high after the
proper number of clock cycles to start the internal write
cycle. Access to the memory array during an internal write
cycle is ignored and programming is continued. Any invalid
op−code will be ignored and the serial output pin (SO) will
remain in the high impedance state.
Figure 11. HOLD Timing
SCK
SO
HIGH IMPEDANCE
Dashed Line = mode (1, 1)
t
LZ
CS
HOLD
t
CD
t
HD
t
HD
t
CD
t
HZ
ORDERING INFORMATION
Device Order Number
Specific
Device
Marking
(Note 14)
Package Type Temperature Range Lead Finish Shipping
†
CAT25010HU4I−GT3 S0U UDFN8−EP −40°C to +85°C NiPdAu 3,000 Units / Tape & Reel
CAT25010VI−GT3 25010E SOIC−8, JEDEC −40°C to +125°C NiPdAu 3,000 Units / Tape & Reel
CAT25010YI−GT3 S01E TSSOP−8 −40°C to +85°C NiPdAu 3,000 Units / Tape & Reel
CAT25020HU4I−GT3 S1U UDFN8−EP −40°C to +85°C NiPdAu 3,000 Units / Tape & Reel
CAT25020VI−GT3 25020E SOIC−8, JEDEC −40°C to +125°C NiPdAu 3,000 Units / Tape & Reel
CAT25020YI−GT3 S02E TSSOP−8 −40°C to +85°C NiPdAu 3,000 Units / Tape & Reel
CAT25040HU4I−GT3 S2U UDFN8−EP −40°C to +85°C NiPdAu 3,000 Units / Tape & Reel
CAT25040VI−GT3 25040E SOIC−8, JEDEC −40°C to +85°C NiPdAu 3,000 Units / Tape & Reel
CAT25040YI−GT3 S04E TSSOP−8 −40°C to +85°C NiPdAu 3,000 Units / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifi-
cations Brochure, BRD8011/D.
14.Specific Device Marking shows the first row top marking for new product (Revision E).
15.All packages are RoHS−compliant (Lead−free, Halogen−free).
16.The standard lead finish is NiPdAu.
17.For detailed information and a breakdown of device nomenclature and numbering systems, please see the ON Semiconductor Device
Nomenclature document, TND310/D, available at www.onsemi.com
