SN74LVC2G38

DUAL 2INPUT NAND GATE

WITH OPEN DRAIN OUTPUT

SCES554A − MARCH 2004 − REVISED OCTOBER 2004

6

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

(OPEN DRAIN)

VM

th

tsu

From Output

Under Test

CL

(see Note A)

LOAD CIRCUIT

S1

VLOAD

Open

GND

RL

RL

Data Input

Timing Input

VI

0 V

VI

0 V

0 V

tw

Input

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

INVERTING AND NONINVERTING OUTPUTS

VOLTAGE WAVEFORMS

PULSE DURATION

tPLH

tPHL

tPHL

tPLH

VOH

VOH

VOL

VOL

VI

0 V

Input

Output

Waveform 1

S1 at VLOAD

(see Note B)

Output

Waveform 2

S1 at VLOAD

(see Note B)

VOL

tPZL

tPZH

tPLZ

tPHZ

VLOAD/2

0 V

VOL + V∆

VLOAD/2 − V∆

≈0 V

VI

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

LOW- AND HIGH-LEVEL ENABLING

Output

Output

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.

C. All input pulses are supplied by generators having the following characteristics: PRR

≤ 10 MHz, ZO = 50 Ω.

D. The outputs are measured one at a time, with one transition per measurement.

E. Since this device has open-drain outputs, tPLZ and tPZL are the same as tpd.

F. tPZL is measured at VM.

G. tPLZ is measured at VOL + V∆.

H. All parameters and waveforms are not applicable to all devices.

Output

Control

VM

VM

VM

VM

VM

VM

VM

VM

VM

VM

VM

VM

VI

VM

VM

1.8 V

± 0.15 V

2.5 V

± 0.2 V

3.3 V

± 0.3 V

5 V

± 0.5 V

1 k

Ω

500

Ω

500

Ω

500

Ω

VCC

RL

2

× VCC

2

× VCC

6 V

2

× VCC

VLOAD

CL

30 pF

30 pF

50 pF

50 pF

0.15 V

0.15 V

0.3 V

0.3 V

V∆

VCC

VCC

3 V

VCC

VI

VCC/2

VCC/2

1.5 V

VCC/2

VM

tr/tf

≤ 2 ns

≤ 2 ns

≤ 2.5 ns

≤ 2.5 ns

INPUT

tPZL (see Notes E and F)

tPLZ (see Notes E and G)

tPHZ/tPZH

VLOAD

VLOAD

VLOAD

TEST

S1

VLOAD/2

Figure 2. Load Circuit and Voltage Waveforms