The device CMOS Dynamic RAM organized as 4,194,304 words x 4 bits with extended data out access mode. It is fabricated with an advanced submicron CMOS technology and designed to operate from a Single 3.3V oniy power supply. Low voltage operation is more suitable to be used on battery backup, portable electronic application. lt is packaged in JEDEC standard 26/24-pin plastic SOJ or TSOP(II).
1. Single 3.3V only power supply 2. High speed tRAC acess time : 50/60ns 3. Low power dissipation (1) Active mode : 432/396 mW (Mas) (2) Standby mode: 0.54 mW (Mas) 4. Extended – data – out(EDO) page mode access 5. I/O level: CMOS level (Vcc = 3.3V) 6. 2048 refresh cycle in 32 ms(Std.) or 128 ms(S-version)
The IN91531N provides a 4-bit data input and a handshaking signal to serve as microcomputer interfaces. Under microcomputer control the IN91531N generates both a DTMF signal and a pulse output for telephone dialing. All necessary dual -tone frequencies and dial pulse outputs are derived from the widely used TV crystal standard, providing high accuracy and stability. The required sinusoidal waveform for individual tones is digitally synthesized on the chip, resulting in a waveform with very low total harmonic distortion.
1. TTL compatible inputs and outputs 2. Uses TV crystal standard (3.58 MHz) to derive all frequencies, providing high accuracy and stability 3. Operating voltage: 2.5 to 5.5 Volts 4. Selectable M/B ratio 5. 10 PPS dial rate 6. High group tone pre-emphasis : 2 dB 7. Low total harmonic distortion in DTMF signaling
Other data sheets within the file : 91531, IL91531N