W78E58 데이터 시트보기 (PDF) - Winbond
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W78E58 Datasheet PDF : 23 Pages
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W78E58
DC Characteristics, continued
PARAMETER
SYM.
SPECIFICATION
MIN.
MAX.
UNIT
TEST CONDITIONS
Output Low Voltage
P0, ALE, PSEN [*3]
VOL2
-
0.45
V
VDD = 4.5V
IOL = +4mA
Sink Current
P1, P2, P3, P4
Sink Current
P0, ALE, PSEN
ISK1
4
ISK2
10
12
mA VDD = 4.5V
Vs = 0.45V
20
mA VDD = 4.5V
Vs = 0.45V
Output High Voltage
VOH1
2.4
-
P1, P2, P3, P4
Output High Voltage
VOH2
2.4
-
P0, ALE, PSEN [*3]
V
VDD = 4.5V
IOH = -100 µA
V
VDD = 4.5V
IOH = -400 µA
Source Current
P1, P2, P3, P4
Source Current
P0, ALE, PSEN
ISR1
ISR2
-120
-8
-250
-14
µA VDD = 4.5V
Vs = 2.4V
mA VDD = 4.5V
Vs = 2.4V
Notes:
*1. RST pin is a Schmitt trigger input. RST has internal pull-low resistors of about 30 KΩ.
*3. P0, ALE and /PSEN are tested in the external access mode.
*4. XTAL1 is a CMOS input.
*5. Pins of P1, P2, P3, P4 can source a transition current when they are being externally driven from 1 to 0. The transition
current reaches its maximum value when VIN approximates to 2V.
AC CHARACTERISTICS
The AC specifications are a function of the particular process used to manufacture the part, the
ratings of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the
specifications can be expressed in terms of multiple input clock periods (TCP), and actual parts will
usually experience less than a ±20 nS variation. The numbers below represent the performance
expected from a 0.8 micron CMOS process when using 2 and 4 mA output buffers.
Clock Input Waveform
- 13 -
Publication Release Date: November 1997
Revision A2
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