GLS37VF040-70-3C-PHE Greenliant, GLS37VF040-70-3C-PHE Datasheet - Page 2

• Manufacturer Part Number: GLS37VF040-70-3C-PHE
• Description: Flash 4M (512Kx8) 70ns Commercial Temp
• Manufacturer: Greenliant

Specifications of GLS37VF040-70-3C-PHE

• Rohs: yes
• Data Bus Width: 8 bit
• Memory Type: Flash
• Memory Size: 4 Mbit
• Architecture: Non Sectored
• Timing Type: Asynchronous
• Interface Type: Parallel
• Access Time: 70 ns
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V
• Maximum Operating Current: 12 mA
• Operating Temperature: + 70 C
• Mounting Style: Through Hole
• Package / Case: PDIP-32

Data Sheet
used to gate data from the output pins. The data bus is in
high impedance state when either CE# or OE# is V
Refer to Figure 5 for the timing diagram.
Byte-Program Operation
The GLS37VF010/020/040 are programmed by using an
external programmer. The programming mode is activated
by asserting 11.4-12V on OE# pin and V
device is programmed using a single pulse (WE# pin low)
of 15 µs per byte. Using the MTP programming algorithm,
the Byte-Program process continues byte-by-byte until the
entire chip has been programmed. Refer to Figure 11 for
the flowchart and Figure 7 for the timing diagram.
Chip-Erase Operation
The only way to change a data from a “0” to “1” is by
electrical erase that changes every bit in the device to
“1”. The GLS37VF010/020/040 use an electrical Chip-
Erase operation. The entire chip can be erased in 100
ms (WE# pin low). In order to activate erase mode, the
11.4-12V is applied to OE# and A
low. All other address and data pins are “don’t care”.
The falling edge of WE# will start the Chip-Erase oper-
ation. Once the chip has been erased, all bytes must
be verified for FFH. Refer to Figure 10 for the flowchart
and Figure 6 for the timing diagram.
©2010 Greenliant Systems, Ltd.
FIGURE 1: Functional Block Diagram
Memory Address
WE#
OE#
CE#
A 9
1 Mbit / 2 Mbit / 4 Mbit Many-Time Programmable Flash
Address Buffer
9
pins while CE# is
Control Logic
IL
on CE# pin. The
X-Decoder
IH.
2
GLS37VF010 / GLS37VF020 / GLS37VF040
Product Identification Mode
The Product Identification mode identifies the devices as
GLS37VF010, GLS37VF020, and GLS37VF040 and man-
ufacturer as Greenliant. This mode may be accessed by
the hardware method. To activate this mode, the program-
ming equipment must force V
Two identifier bytes may then be sequenced from the
device outputs by toggling address line A
Table 3 for hardware operation.
TABLE 1: Product Identification
Design Considerations
The GLS37VF010/020/040 should have a 0.1 µF ceramic
high frequency, low inductance capacitor connected
between V
as close to the package terminals as possible.
OE# and A
tion of an Erase operation. OE# must remain stable at V
for the entire duration of the Program operation.
Manufacturer’s ID
Device ID
GLS37VF010
GLS37VF020
GLS37VF040
DD
9
must remain stable at V
and GND. This capacitor should be placed
DQ 7 - DQ 0
SuperFlash
Y-Decoder
I/O Buffers
Memory
H
(11.4-12V) on address A
Address
0000H
0001H
0001H
0001H
H
for the entire dura-
S71151-11-000
0
. For details, see
1151 B1.1
Data
BFH
C5H
C6H
C2H
T1.2 1151
05/10
9
H
.