W91442N Winbond, W91442N Datasheet
W91442N
Available stocks
Related parts for W91442N
W91442N Summary of contents
Page 1
... Flash break time (73, 100, 300, 600 msec.) selectable by keypad, and the pause time is 1 sec. On-chip power-on reset Uses 3.579545 MHz crystal or ceramic resonator Packaged in 18-pin plastic DIP The different dialers in the W91440N series are shown in the following table: TYPE NO. REPLACEMENT TYPE NO. W91442N W91442 W91443 W91444 W91446 W91447 W91444G W91445G ...
Page 2
... Otherwise switched off. MODE 13 I Pulling mode pin to V Pulling mode pin to V 40:60 (10 ppS only for W91442N and 20 ppS for W91443N). Floating mode pin places the dialer in pulse mode with M/B ratio 33:67 (10 ppS only for W91442N and 20 ppS for W91443N ...
Page 3
Pin Description, continued SYMBOL PIN I Hook switch input. HKS HKS = V HKS = V HKS pin is pulled N-channel open drain dialing pulse output. DP Flash key will cause ...
Page 4
BLOCK DIAGRAM ROW (R1 to R4, Vx) KEYBOARD INTERFACE COLUMN (C1 to C5) D/A DTMF CONVERTER FUNCTIONAL DESCRIPTION Keyboard Operation S: Store function key A: Indirect repertory dialing function key R/P: Redial and pause function key SAVE: Save function key ...
Page 5
Normal Dialing OFF HOOK , D1, D2 will be dialed out. 2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing. Redialing OFF HOOK , D1 , ...
Page 6
Pulse-to-tone (*/T) OFF HOOK , the mode switch is set in pulse mode, then the output signal will be: D1, D2, , Dn, Pause (3.6 sec.), D1', D2', (Pulse the mode switch is ...
Page 7
ABSOLUTE MAXIMUM RATINGS PARAMETER DC Supply Voltage Input/Output Voltage Power Dissipation Operation Temperature Storage Temperature Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. DC CHARACTERISTICS (V V ...
Page 8
DC Characteristics, continued PARAMETER SYMBOL DP Output Sink Current T/P MUTE Output Sink Current Keypad Input Drive Current Keypad Input Sink Current HKS I/P Pull-High Resistor Keypad Resistance AC CHARACTERISTICS ( 2.5V 3.579545 MHz ...
Page 9
AC Characteristics, continued PARAMETER SYMBOL Flash Pause Time Pause Time On-hook Debounce T Time Notes: 1. Crystal parameters suggested for proper operation are Rs < 100 ohms mH 0.02 pF pF, Cl ...
Page 10
Timing Waveforms, continued HKS KEY IN DP T/P MUTE DTMF OSC. HKS KEY IN DP T/P MUTE DTMF OSC. T KRD R/P T KID IDP T PDP Low OSCILLATION Figure 1(b) Pulse Mode Auto Dialing ...
Page 11
Timing Waveforms, continued HKS 3 KEY IN T KID DTMF T TD T/P MUTE DP OSC. Figure 2(a) Tone Mode Normal Dialing Timing Diagram HKS KEY IN DTMF T/P MUTE DP OSC ITP ITP High OSCILLATION ...
Page 12
Timing Waveforms, continued HKS KEY IN DTMF T/P MUTE DP OSC. HKS KEY IN DP T/P MUTE DTMF OSC. T KRD R/P T KID ITP High OSCILLATION Figure 2(c) Tone Mode Auto Dialing Timing Diagram 2 R/P ...
Page 13
Timing Waveforms, continued HKS KEY PDP T/P MUTE DTMF OSC. HKS F KEY IN T KID DP T/P MUTE DTMF OSC KID IDP T P OSCILLATION Figure 4. Pulse-to-tone Timing ...
Page 14
... No. 115, Sec. 3, Min-Sheng East Rd., Taipei, Taiwan TEL: 886-2-7190505 FAX: 886-2-7197502 Note: All data and specifications are subject to change without notice. W91440N SERIES Winbond Electronics North America Corp. Winbond Memory Lab. Winbond Microelectronics Corp. Winbond Systems Lab. 2730 Orchard Parkway, San Jose, CA 95134, U.S.A. ...