19-2 MC68VZ328 User’s Manual
AC Electrical Characteristics
19.2 DC Electrical Characteristics

Table 19-2 contains both maximum and minimum DC characteristics of the MC68VZ328.

19.3 AC Electrical Characteristics

The AC characteristics consist of output delays, input setup and hold times, and signal skew times. All

signals are specified relative to an appropriate edge of other signals . All ti ming s pecif icati ons are spe cifi ed

at an operating frequency from 0MHz to 33 MHz with an operating supply voltage from VDDmin to

VDDmax under an operating temperature from TL to TH. All timing is measured at 95 pF loading.

19.3.1 CLKO Reference to Chip-Select Signals Timing

Figure 19-1 on page19-3 compares the chip-select signal time referenced with the CLKO signal. Note that

WS is the number of wait states in the current memory access cycle. The signal values and units of

measure for this figure are found in Table19-3 on page 19-3. For detailed information about the individual

signals, see Chapter 6, “Chip-Select Logic.”

Table 19-2. Maximum and Minimum DC Characteristics
Number or
Symbol Characteristic (3.0 ± 0.3)V Unit
Minimum Typical Maximum
1 Full running operating current at 33MHz —2040mA
2 Standby current1
1.Standby current is measured only when the real-time clock is running.
—3560µA
VIH Input high voltage 0.7VDD ——V
VIL Input low voltage 0.4 V
VOH Output high voltage (IOH=2.0mA) 0.7V
DD ——V
VOL Output low voltage (IOL= -2.5 mA) 0.4 V
IIL Input low leakage current
(VIN= GND, no pull-up or pull-down) ——±1µA
IIH Input high leakage current
(VIN=V
DD, no pull-up or pull-down) ——±1µA
IOH Output high current
(VOH=0.8V
DD, VDD=2.9V) 4.0 —mA
IOL Output low current
(VOL= 0.4V, VDD =2.9V) ——-4.0mA
IOZ Output leakage current
(Vout=V
DD, output is three-stated) ——±5µA