W19B320ATB Datasheet, PDF (4/53 Pages) Winbond – 4M × 8/2M × 16 BITS 3V FLEXIBLE BANK FLASH MEMORY

W19B320AT/B
1. GENERAL DESCRIPTION
The W19B320AT/B is a 32Mbit, 2.7~3.6-volt flexible bank CMOS flash memory organized as 4M x 8
or 2M × 16 bits. The word-wide (× 16) data appears on DQ15-DQ0, and byte-wide (x 8) data appears
on DQ7-DQ0. The device can be programmed and erased in-system with a standard 3.0-volt power
supply. A 12-volt VPP is not required. The unique cell architecture of the W19B320AT/B results in fast
program/erase operations with extremely low current consumption (compared to other comparable
3-volt flash memory products). The device can also be programmed and erased by using standard
EPROM programmers.
2. FEATURES
Performance
• 2.7~3.6-volt write (program and erase)
operations
• Fast write operation
− Sector erases time: 0.4 Sec (typical)
− Chip erases time: 49 Sec (typical)
− Byte programming time: 5 μs (typical)
• Read access time: 70 ns
• Typical program/erase cycles:
− 100K
• Twenty-year data retention
• Ultra low power consumption
− Active current (Read): 10 mA (typical)
− Active current (Read while Erase/Program):
21 mA (typical)
− Standby current: 0.2 μA (typical)
Architecture
• Flexible Bank architectures
− Consist of four banks that customer can
group the bank size as they needed
− Bank 1: 4M; Bank 2: 12M;
Bank 3: 12M; Bank 4: 4M
• Security Sector Size: 256 Bytes
− The Security Sector is an OTP; once the
sector is programmed, it cannot be erased
• Simultaneous Read/write operation
− Data can be continuously read from one bank
while processing erase/program functions in
other bank with zero latency
• JEDEC standard byte-wide and word-wide
pinouts
• Manufactured on WinStack 0.18μm process
technology
• Available packages: 48-pin TSOP and 48-ball
TFBGA (6x8mm)
Software Features
• Compatible with common Flash Memory
Interface (CFI) specification
− Flash device parameters stored directly on
the device
− Allows software driver to identify and use a
variety of different current and future Flash
products
• Erase Suspend/Erase Resume
− Suspends erase operations to allow
programming in same bank
• End of program detection
− Software method: Toggle bit/Data polling
• Unlock Bypass Program command
− Reduces overall programming time when
issuing multiple program command
sequences
Hardware Features
• Ready/#Busy output (RY/#BY)
− Detect program or erase cycle completion
• Hardware reset pin (#RESET)
− Reset the internal state machine to the read
mode
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