MAX6327 데이터 시트보기 (PDF) - Philips Electronics
부품명
상세내역
제조사
MAX6327 Datasheet PDF : 12 Pages
| |||
Philips Semiconductors
3-pin ultra-low power SC70/SOT
microprocessor reset circuit
Product data
MAX632x/MAX634x
APPLICATION INFORMATION
Interfacing to µPs with Bidirectional Reset Pins
The MAX6328/MAX6348 RESET output is open drain and are easily
interfaced with microprocessors which have bidirectional reset pins,
such as the Motorola 68HC11. Directly connecting the
MAX6328/MAX6348 RESET output to the µPs reset input and
providing a pull-up resistor to VDD allows either device to
independently assert reset (Figure 7).
VDD
VDD
RESET
MAX6328/
MAX6348
RPU
VDD
RESET
MOTOROLA
68HCXX
GND
GND
SL01835
Figure 7. Interfacing to µPs with Bidirectional Reset Pins
Negative-going VDD transients
The MAX6326-MAX6348 Series resets are relatively immune to
short duration, negative-going VDD transients or power glitches. This
capability greatly reduces false resets with short-duration pulses.
Figure 8, Maximum Transient Duration versus Reset Comparator
Overdrive, shows the maximum transient condition for which reset
signal are not generated. The graph shows the maximum pulse
width that a negative-going transient may have before it will
generate a reset signal. Note: as the amplitude of the transient
increases, the maximum allowable transient pulse width decreases.
450
400
350
300
250
200
MAX6346/MAX6347/
150
MAX6348
100
50 MAX6326/MAX6327/
MAX6328
0
1
10
100
1000
RESET COMPARATOR OVERDRIVE, Vth – VCC (mV)
SL01836
Figure 8. Maximum transient duration without causing a
reset pulse versus reset comparator overdrive.
System configurations with various µPs
The MAX326-MAX6348 Series resets provide a system solution for
various µPs. Figures 9 and 10, respectively, reference the Philips
µPs which are compatible with the MAX6326/MAX6346 and
MAX6327/MAX6347 system resets.
VDD
VDD
RESET
MAX6326/
MAX6346
VDD
RESET
µP(Note 1)
GND
GND
SL01837
NOTE:
1. Philips microprocessors with active-LOW resets: All 16-bit
devices from XA-family (XA-Cxx, XA-Gxx, XA-Sxx, XA-Hxx), all
LPC7xx devices (P87LPC760/761/762/767/768/769,
P80C591/P87C591 (with on-chip CAN controller).
Figure 9. µP System Diagram using MAX6326/MAX6328
Push-Pull, Active-LOW Resets
VDD
VDD
RESET
MAX6327/
MAX6347
VDD
RESET
µP(Note 1)
GND
GND
SL01838
NOTE:
1. Philips microprocessors with active-HIGH resets : 8xC5x, 8xC3x,
8xC5xX2, 8xC3xX2, 8xC51Fx, 8xC51Rx+, 89C51Rx2, 89C66x,
8xC554, 8xC552, etc.
Figure 10. µP System Diagram using MAX6327/MAX6347
Push-Pull, Active-HIGH Resets
2003 Aug 05
8
Share Link: 